Version History

v0.11.0

Added file /resources/minimal.mei which is used by constructor meico.mei.Mei.Mei() to instantiate an empty Mei object. The object now contains an MEI with no meaningful content, but when writing it to a file it is valid now. Using this constructor will now require exception handling!

v0.10.0

Conversion of MEI to MusicXML implemented. Thanks to Matthias Nowakowski.
- meiHead nearly completely.
- music most of the note-related data.
- See MEI2MusixXml_Coverage_Documentation.md for more detail.

v0.9.4

Conversion of MEI to MusicXML has been added to the commandline interface of meicoApp.

v0.9.3

Added new methods getAllMdivs() to class meico.mei.Mei to retrieve all mdiv elements in the MEI's music environment. However, in case of nested mdiv elements, only the leaf ones are returned. I.e., the returned list will only contain mdiv elements that do not contain other mdiv elements.
Added new methods getAllVariantEncodings() to class meico.mei.Mei to retrieve all app and choice elements from the MEI.

v0.9.2

Expansion of search for the title in method meico.mei.Mei.getTitle(), so it supports MEI 3.0 (workDesc) and MEI 4.0+ (workList).

v0.9.1

Some minor preparations in class meico.mei.Mei2MusicXmlConverter for MEI to MusicXML conversion.

v0.9.0

Added basic MusicXML integration to meico and meicoApp. Both MusicXML file formats, raw (.musicxml, .xml) and compressed (.mxl) are supported for reading and writing.
While the ProxyMusic framework does not support marshalling and demarshalling of MusicXML score-timewise, class meico.musicxml.MusicXml supports conversion of score-timewise to score-partwise and vice versa.
Integration of MusicXML basic functionality in meicoApp.
New class meico.mei.Mei2MsmMpmConverter has been added to implement a better modularization of different conversion options. All conversion functionality from MEI to MSM and MPM moved from meico.mei.MEI and meico.mei.Helper into this class. Class meico.mei.Helper still holds all static methods, as these are useful also outside of this particular conversion.
Slight changes in methods convert() and makeMovement() of class meico.mei.Mei2MsmMpmConverter. The relatedResources entries in the MPM are now only with filenames and no longer with the absloute path on the local machine.
Added MusicXML Coverage Documentation.
XOM update to v1.3.8.
Enhancement in meico.xml.XmlBase.XmlBase(String xml) constructor. The added exceptions may require some applications to extend their exception handling also for other classes that are based on XmlBase.
Added new class meico.supplementary.InputStream2StringConverter.
Verovio update to v3.15.0-5abc7c0 and fix (due to broken backward compatibility).

v0.8.48

Added new methods meico.midi.Midi.getMinimalPPQ() that computes the minimal integer timing resolution (in pulses per quarter note) necessary for an accurate representation of a MIDI sequence.
The eponymous method in class meico.msm.Msm has been updated with the same algorithm.
Another addition is method meico.midi.Midi.convertPPQ() that allows to convert the timing basis of a MIDI sequence, similar to the eponymous method in class meico.msm.Msm.

v0.8.47

Potential bus fix in method meico.mpm.elements.maps.TempoMap.getTempoAt() that ensures that the exponent attribute of a TempoData object is present.
New methods were added to class meico.mpm.elements.maps.TempoMap that reduces (monotonous) series of successive tempo instructions to one instruction.
MeicoApp now imports MIDI files with extension .mid (as before) and .midi (this is new).

v0.8.46

Private method meico.mpm.elements.maps.TempoMap.renderTempoToMap(double date, int ppq, TempoData tempoData) has been made public and refactored to computeDiffTiming() to better describe its function.
Class meico.mpm.elements.maps.GenericMap has new methods:
- contains() to check whether a given XML element is an entry in this map.
- getElementIndexOf() to determine the index of a given element.

v0.8.45

Bugfix in method meico.mpm.elements.Performance.getAllMsmPartsAffectedByGlobalMap() which caused some global performance features not being applied correctly to all affected maps.

v0.8.44

Bugfix in meico.mpm.elements.maps.OrnamentationMap methods renderAllNonmillisecondsModifiersToMap() and renderMillisecondsModifiersToMap(). Temporary attributes from the temporalSpread modifier were processed incorrectly.

v0.8.43

Bugfix in class meico.mpm.elements.styles.defs.OrnamentDef, the attribute time.units of element temporalSpread is renamed to time.unit (without "s") in accordance to the MPM shema definition.

v0.8.42

Added all necessary functionality to handle IDs in MPM elements temporalSpread and dynamicsGradient.

v0.8.41

Added missing namespace to the creation of a element relatedResources in constructor meico.elements.metadata.Metadata.Metadata(Author author, Comment comment, Collection<RelatedResource> relatedResources).
JavaDoc update.

v0.8.40

Update of MPM ornamentation-related code in correspondence with MPM version 2.0.3.

v0.8.39

The following methods have been made public, so applications can request corresponding data from the classes.
- meico.mpm.elements.maps.ArticulationMap.getArticulationDataOf(),
- meico.mpm.elements.maps.DynamicsMap.getDynamicsDataOf(),
- meico.mpm.elements.maps.ImprecissionMap.getDistributionDataOf(),
- meico.mpm.elements.maps.MetricalAccentuationMap.getMetricalAccentuationDataOf(),
- meico.mpm.elements.maps.OrnamentationMap.getOrnamentationDataOf(),
- meico.mpm.elements.maps.RubatoMap.getRubatoDataOf(), and
- meico.mpm.elements.maps.TempoMap.getTempoDataOf().
Update of meicoApp's internal Verovio to v3.11.0-e2d6db8.

v0.8.38

Classes meico.mpm.elements.styles.defs.OrnamentDef.DynamicsGradient and meico.mpm.elements.styles.defs.OrnamentDef.TemporalSpread have been extended with references to their XML representations.
JavaFX externals have been removed from meicoApp as they do not help with Java versions 11+.

v0.8.37

New method meico.mpm.Mpm.isInNamespace(). to check whether a given element name is in the MPM namespace. One of the constructors of meico.mpm.elements.map.GenericMap uses this to apply the MPM namespace more properly - it can also be used to create maps that are not in MPM namespace, such as score or channelVolumeMap in MSM.
Methods meico.mpm.elements.maps.AsynchronyMap.renderAsynchronyToMap() and meico.mpm.elements.maps.ImprecisionMap.addOffsetsToAttributes() have been enhanced, so they do no longer produce negative timings, i.e. shift the timing of events to negative milliseconds dates.

v0.8.36

Bugfix in meico.mpm.elements.Dated.addMap().

v0.8.35

Export of MEI to MSM and MPM will now keep the staffDef's ID as the ID of the MSM and MPM part.
Two addition to the instruments dictionary: Piano Left Hand and Piano Right Hand.

v0.8.34

Added support for attribute xml:id on MPM maps in class meico.mpm.elements.maps.GenericMap.
meico.mpm.elements.maps.GenericMap constructor has now full support for MSM score.
Fixed data integrity of MPM maps that get processed by rubato transformation during performance rendering.
Optimization of the performance rendering process.
New method meico.msm.Msm.getPart() to retrieve a specific part element.
Ornamentation support added to MPM API.
- New classes are meico.mpm.elements.styles.OrnamentationStyle, meico.mpm.elements.styles.defs.OrnamentDef, meico.mpm.elements.styles.defs.OrnamentDef.DynamicsGradient, meico.mpm.elements.styles.defs.OrnamentDef.TemporalSpread, meico.mpm.elements.maps.OrnamentationMap, and meico.mpm.elements.maps.data.OrnamentData.
- Added MEI export for element arpeg to MPM ornamentation. New method meico.mei.Mei.processArpeg() and additions to meico.mei.Mei.makeMovement() and class meico.mei.Helper.
- Ornamentation has been added to the performance rendering in meico.mpm.elements.Performance.perform().
Enhancement of method meico.mei.Helper.computeControlEventTiming(); in search for the timing of an MEI control event, it will now also look at the first reference in attribute plist.
Deleted package meico.midi.legacy.

v0.8.33

New method meico.midi.Midi.exportAudio(Soundbank soundbank) to convert MIDI to audio with a soundfont that is already loaded, so its corresponding File is no longer required.

v0.8.32

Enhancement/reimplementation of method meico.mpm.elements.maps.ArticulationMap.renderArticulationToMap_millisecondModifiers() to allow more extreme delays and duration changes.

v0.8.31

Reimplementation of method meico.mpm.elements.maps.AsynchronyMap.renderAsynchronyToMap(). The previous version did handle some note offsets incorrectly. This is fixed in the new version.

v0.8.30

New method meico.midi.Midi.addOffset() to add a timing offset (in ticks) to all events in a MIDI sequence.
In method meico.audio.Audio.convertWaveform2Image() a dark gray center line is added to the image rendering.
Added another variant of method meico.audio.Audio.convertWaveform2Image() that uses an externally instantiated audio frame dispatcher pump, so the application can also cancel its processing.
Generalized method meico.audio.Audio.convertDoubleArray2ByteArray() to allow more than just 16 bit sample size.
Another generalization of method meico.audio.Audio.convertByteArray2DoubleArray() that should now also accept audio formats other than mono and stereo.

v0.8.29

Bugfix in method meico.audio.Audio.convertWaveform2Image() that caused an IndexOutOfBoundsException when the amplitude of the signal is at maximum.

v0.8.28

Minor fix in method meico.supplementary.RandomNumberProvider.getValue(int index) to ensure that only non-negative index values are processed.

v0.8.27

A little optimization in method meico.audio.Audio.convertSpectrogramToImage(). In addition, this method has been extended with a new argument normalize to give applications the possibility to decide whether the spectrogram values should or should not be normalized for rendering.
Internal Verovio update to v3.7.0-dev-e93a13d.

v0.8.26

Minor fix in method meico.audio.Audio.convertByteArray2DoubleArray() so that it no longer prints an error message when there is no error.
New methods meico.audio.Audio.exportWaveformImage() and meico.audio.Audio.convertWaveform2Image() that renders the audio data to a BufferedImage instance. The functionality was also added to the meicoApp GUI. However, the waveform image exported here is rather low-res by default. The methods allow larger pixel resolutions; applications can specify the image dimensions and the slice of audio to be rendered freely.

v0.8.25

New supplementary class meico.supplementary.ColorCoding that simplifies the mapping of one-dimensional values to colors. Meico uses these for spectrogram visualizations.
Advancements in method meico.audio.Audio.convertSpectrogramToImage(). It is now possible to create spectrogram images with one of several color codings.
Updated Ant build script.
Updated internal Verovio distribution to v3.5.0-dev-7cfde60.

v0.8.24

Added package information to the documentation.
Added Constant Q Transform spectrogram export to class meico.audio.Audio. The method is exportConstantQTransformSpectrogram().
- Method convertSpectrogramToImage() makes it convenient to convert the spectrogram data to pixel data.
- A new external has been added to the meico ecosystem. Jipes is an open source signal processing library by Hendrik Schreiber. It can be used to build any further audio analysis methods following the same pattern as the CQT export.
- MeicoApp has been extended accordingly with a new export option in the commandline application and in the graphical application.

v0.8.23

Fixed constructor meico.midi.MidiPlayer.MidiPlayer(Midi midi). Now it assigns the MIDI data to its sequencer.
Added new method meico.midi.MidiPlayer.setMidiOutputPort() which allows setting an output port different from the internal Gervill synthesizer.
- The internal Synthesizer instance is kept alife, so that any preloaded soundfonts are immediately available when switching back.
- To switch back to Gervill is important not to provide a new instance but to use the original one, like this midiPlayer.setMidiOutputPort(midiPlayer.getSynthesizer()). A shortcut is this midiPlayer.setMidiOutputPort(null) that will automatically choose the internal synthesizer as default.
Verovio update in meicoApp.

v0.8.22

Bugfix in methods meico.mpm.elements.maps.DynamicsMap.getDynamicsDataOf() and meico.mpm.elements.maps.RubatoMap.getRubatoDataOf().

v0.8.21

Little enhancement in methods meico.mpm.elements.maps.ArticulationMap.addStyleSwitch() that is now also able to handle argument defaultArticulation == null.
Added constructors to classes meico.mpm.elements.maps.data.ArticulationData, MetricalAccentuationData, RubatoData, DynamicsData, TempoData, and DistributionData so they can now be instantiated from a corresponding XML element.
Fix in method meico.mpm.elements.maps.MetricalAccentuationMap.addAccentuationPattern(MetricalAccentuationData data). It has rejected input data that defined an accentuationPatternDef name but not the corresponding object itself. However, this is the usual situation when parsing an XML element. So this had to be fixed.
- Same for method meico.mpm.elements.maps.RubatoMap.addRubato(RubatoData data).
Bugfix: corrected constant value meico.mpm.Mpm.RUBATOR_STYLE = "RubatorStyles" to "RubatoStyles".
Introduced some constants to class meico.mpm.elements.maps.data.DistributionData that provide the default strings for the type of the distribution. These are now used in class meico.mpm.elements.maps.ImprecisionMap instead of the hard-coded strings, so it will be easier to alter and extend those constants in future updates.

v0.8.20

In classes meico.mpm.elements.maps.GenericMap and meico.mpm.elements.maps.ArticulationMap a variant of method addStyleSwitch() has been added that supports input of an ID string.

v0.8.19

Added new class meico.mpm.elements.metadata.Comment and incorporated it in all classes that handle MPM metadata comment elements.
In class meico.mpm.elements.metadata.Metadata some new methods have been added: removeAuthor() and removeComment().
Enhancement in method meico.mpm.Mpm.addPerformance() to cancel if the input Performance object is null. It also got a boolean return value to indicate the success of the action.
The same has been added to method meico.mpm.elements.Performance.addPart(). It returns false also if the part is already in the performance.
The same has been added to methods meico.mpm.elements.metadata.Metadata.addAuthor(), addComment() and addRelatedResource(). Instead of an index they return -1.
Bugfixes in methods meico.mpm.elements.metadata.Author.setId() and removeAuthor().
Classes meico.mpm.elements.Part, Performance have been extended to provide access also to the element's xml:id.
New methods clear() and renameStyleDef() in class meico.mpm.elements.Header to remove all content of from the respective MPM element.
New method clear() in class meico.mpm.elements.Dated to remove all content of from the respective MPM element.
Bugfix in method meico.mpm.elements.Header.removeStyleType(), removeStyleDef(), addStyleType().
Lots of enhancement and refactoring of all classes in packages meico.mpm.elements.styles and meico.mpm.elements.styles.defs.
Correction of rubatoDef factory method meico.mpm.elements.styles.defs.RubatoDef.createRubatoDef(String name) to createRubatoDef(String name, double frameLength). A rubatoDef without a frameLangth is invalid. Hence the factory could never create a rubatoDef. This is fixed.
Refactoring of method meico.mpm.elements.styles.defs.AccentuationPatternDef.getSize() to size() to follow the convention used in all other classes.
Added another method addAccentuation() to class meico.mpm.elements.styles.defs.AccentuationPatternDef that supports input of an id string.

v0.8.18

Enhancement of class meico.mpm.elements.metadata.Metadata so it can be instatiated with related resources.

v0.8.17

Made class meico.midi.InstrumentsDirectory public, so it can be used outside of its package.
Extended method meico.mei.Mei.makePart().
- This addresses issue #23 where the staff label did not suffice to properly indicate which General MIDI instrument should be chosen during the MIDI export.
- Thus, support for MEI element instrDef has been added. It should be used as follows.
```
<staffDef clef.line="2" clef.shape="G" lines="5" n="1" label="unhelpful label">
    <instrDef midi.instrname="Violin" midi.instrnum="40"/>
</staffDef>
```
  Only one of the attributes midi.instrnum (prioritized) and midi.instrname is required. The former should have values from 0 to 127 (not 1 to 128!). A list of General MIDI instrument names and numbers can be found on Wikipedia (here the numbers must be decreased by 1!).
- Meico will add a programChangeMap to the MSM part during export and use this instead of the label to generate the corresponding MIDI messages during MIDI export.
- The MEI Coverage Documentation has been updated accordingly and provides further information.

v0.8.16

Little tweak in method meico.mpm.maps.DynamicsMap.renderDynamicsToMap(): If a dynamicsMap does not have a dynamics element at date 0.0 but there are notes to be performed before the first dynamics instruction, they now get a default velocity value.

v0.8.15

Little tweak in method meico.mei.Mei.processMeasure() as it struggled to remove and inserting timeSignature elements from timeSignatureMap when the measure does not comply with the given time signature.
Indexing correction in method meico.mpm.elements.styles.defs.AccentuationPatternDef.addAccentuationToArrayList() so accentuations are added in the correct order to patterns.
In method meico.mei.Mei.processSyl() attribute wordpos was mandatory (with values i or m) to process attribte con. This did not work for some cases. So, wordpos is now being ignored and con will always be processed.

v0.8.14

Added method meico.mei.Helper.addUUID() which encapsulates the generation of unique xml:id attributes. The corresponding code in method meico.msm.Msm.addIds() has been adapted.
Added another method addAccentuationPattern() to class meico.mpm.elements.maps.MetricalAccentuationMap which allows setting attribute stickToMeasures.
Minor fix in method meico.mei.Mei.addArticulationToMap() which generated a noteid string from null instead of setting the string null.
After update 0.8.12, method getCurrentTimeSignature() in class meico.mei.Helper required more context as input to determine the time signature information. It has been updated accordingly. This required adaptations also in several other methods in classes meico.mei.Helper and meico.mei.Mei which have been done, too.

v0.8.13

Fix of the processing of <accid> elements where the parent <note> has different graphical and gestural pitch, see issue #17.

v0.8.12

Enhancement of the processing of MEI tie element.
Bugfix in method meico.mei.Mei.processBreath() that generated a wrong default articulation.
Bugfix in method meico.mpm.elements.maps.ArticulationMap.renderArticulationToMap_noMillisecondModifiers(): NullPointerException in an error message.
Optimization of methods meico.mei.Helper.getPreviousSiblingElement() and getNextSiblingElement().
An extensive overhaul of method meico.mei.Mei.processMeasure() which is now able to handle the situation that no global time signature is given (via scoreDef) and only locally defined in the staffDef elements.
Some code polishing.

v0.8.11

Another bugfix: The endid of MEI tie elements was not properly resolved.

v0.8.10

Bugfix: If an MEI space element was in a layer environment, it was falsely interpreted as textual gap. However, it is a musical gap and should be interpreted as rest.

v0.8.9

Updated MPM API to MPM v2.1.0. This update moved element relatedResources into element metadata.
Added new class meico.mpm.elements.metadata.RelatedResource.
Bugfix: MEI to MPM conversion generated tempo style switches while there was no tempo style to switch to. This has been fixed.

v0.8.8

Added a getter to class meico.mpm.Mpm to provide access to the metadata: getMetadata().
Added support for MEI verse and syl elements, so they are converted to MSM lyrics elements.
Added support for MEI dynam and tempo elements that are positioned within a verse environment.
New method processSpace() for processing MEI space elements. These elements are usually interpreted as rests. However, this should not be done when they encode a textual space, e.g. in lyrics. That is what the method ensures.

v0.8.7

Enhancement in method meico.msm.Msm.parseProgramChangeMap() so MIDI program change events can also be generated after date 0.0. This makes it possible to switch instrument/timbre during the music.

v0.8.6

Another bugfix in method meico.mpm.elements.styles.defs.ArticulationDef.articulateNote() so style switches with no attribute defaultArticulation (it is optional) are supported.

v0.8.5

New methods in class meico.mei.Helper: pulseDuration2decimal(), decimalDuration2HtmlUnicode(), durationRemainder2UnicodeDots(), accidDecimal2unicodeString(). These can beused to generate Unicode strings from note value and pitch information.
Bugfix in method meico.mei.Mei.makeMovement(). It checks for the file to be not null before accessing it.
Bugfix in method meico.mpm.elements.styles.defs.ArticulationDef.articulateNote() that cause articulation rendering running into an infinite loop when absoluteDurationChange is checked to create only non-negative durations.

v0.8.4

Another bugfix in method meico.mpm.elements.maps.DynamicsMap.renderDynamicsToMap(). Seems like the previous update solved one bug and introduced another.
Enhancement in method meico.mpm.elements.maps.DynamicsMap.getDynamicsDataOf(). It is now possible to set subNoteDynamics="true" even in a constant dynamics segment. This can be useful after a continuous segment to avoid sudden steps of the MIDI channel volume controller.

v0.8.3

Added a new Output option to meicoApp. It is now possible during expressive MIDI rendering to also get an MSM that is enriched with performance data (milliseconds dates, velocities, etc.). This is mostly relevant for debugging purposes with no direct practical use for end users, yet.
Changed method meico.app.gui.StatusPanel.setMessage() to write the output message not directly but from a JavaFX thread. This should eliminate some of the minor (non-blocking) exceptions that are thrown every now and then.
Bugfix in method meico.mpm.elements.maps.RubatoMap.renderRubatoToMap() that caused some end date computations to return NaN.
Bugfix in method meico.mpm.elements.maps.data.DynamicsData.getSubNoteDynamicsSegment() that cause decrescendi not being rendered with sub-note dynamics.
Optimizations in method meico.mpm.elements.maps.DynamicsMap.renderDynamicsToMap().
New additions to class meico.mpm.elements.maps.GenericMap: methods getFirstElement(), getLastElement() and isEmpty().

v0.8.2

Bugfix in class meico.msm.Msm: If the MSM provided a programChangeMap for each part, only the first was correctly rendered to MIDI. This has been fixed.

v0.8.1

New functionality added to class meico.msm.Msm: method addIds() adds xml:id to each note and rest element that does not have one. MeicoApp has been updated accordingly.

v0.8.0

Reorganization of the meico programming library and application code as well as its release assets.
- Meico is basically a programming library. All content of package meico.app is example code for meico's usage in application projects. However, for the graphical meico application certain JavaFX dependencies had to be added to meico which complicated development for other applications that do not rely on JavaFX. Thus, we decided to split the meico code base into the core functionality and the example applications.
- The release assets include
  - meico.jar (the headless core functionality to be used by other development projects) and
  - meicoApp.jar (the standalone runnable jar with the commandline and graphical application, it includes meico.jar).
- The codebase has been reorganized accordingly.
  - The master branch contains the headless meico, no application code or application-related dependencies. This is all you need to develop your own meico application.
  - The meicoApp branch contains the meico.app package and all other demo applications (meicoPy and the REST demo).
- Class meico.Meico has been stripped down. It no longer contains any launcher code, only meico's current version number. MeicoApp lanches from its own main class meico.app.Main.
- Class meico.supplementary.VerovioProvider as been removed. Verovio cannot be part of the headless meico base. It works only with a browser environment and that is only present in meicoApp (which contains Verovio).
- File README.md has been updated. Livenses are also a bit different for those who use the headless meico package as JavaFX, Verovio and Font Awesome are used only in meicoApp and not in the base package.

v0.7.10

Class meico.mpm.Mpm, when instantiated, parses the XML data and generates an exception if no element metadata was found. However, this is no encoding error and should not produce error messages. This has been fixed.
Local Verovio update to v2.7.0-dev-02b4f36.
Added new class meico.supplementary.VerovioProvider to be used in other classes (Mei, MusicXml) as a convenient handle to get the Verovio Toolkit script.

v0.7.9

Method meico.audio.Audio.convertByteArray2DoubleArray() has been generalized to also work with sample sizes other than 16 bit. The method will no longer mix the two stereo channels into one, but returns an ArrayList with both channels, one double array each.
Replaced the Java LAME sources in package meico.audio by external file net.sourceforge.lame-3.98.4.jar.
In class meico.audio.Audio the new method decodeMp3ToPcm() has been added. With this, MP3 files can be imported, are decoded to PCM audio and can be stored as WAV files.
Methods writeAudio() and writeMp3() in class meico.audio.Audio have been improved to make sure that a wave file is not stored with .mp3 extension and vice versa.
Some minor JavaDocs improvements and README.md update.
Changed com.sun.media.sound.InvalidDataException by Exception for compatibility with newer Java versions.

v0.7.8

Added MPM metadata support to package meico.mpm.
The MPM metadata will also be generated during MEI-to-MPM export.
Added a JavaDoc shield to README.md

v0.7.7

Some refactoring in classes meico.mpm.elements.maps.ImprecisionMap and meico.mpm.elements.maps.data.DistributionData to avoid naming confusion with the MPM specification.
Added MPM validation to class meico.app.gui.DataObject.
In class meico.mpm.Mpm
- Fix: No generation of an empty element relatedResources.
- Extension: Methods for the deletion of elements from relatedResources have been added.

v0.7.6

Added support for attribute seed to the MPM distribution elements and imprecision maps.

v0.7.5

Some refactoring of MPM attributes to be compliant with the schema definition.
In the GUI app, when an MPM is reloaded and its performances are displayed on the workspace, these performance objects do not update together with the MPM and, thus, are no longer consistent with their parent. This is confusing to the user. Hence, they are removed now and newly created from the updated data.

v0.7.4

Enhancement in method meico.mei.Mei.processMeasure(). If a measure does not comply with the underlying time signature meico needs to add another timeSignature element in the timeSignatureMap. However, the subsequent measure may comply with the original time signature. Hence, at the end of the non-compliant measure meico should switch back to the original time signature. This is what it does now.
Minor stability fix in method meico.mei.Mei.addDynamicsToMpm().

v0.7.3

MPM attributes startStyle and defaultArticulation have been removed from all ...-Map elements. Initial styles are indicated by style switches (e.g. <style date="0.0" name.ref="my initial style"/> and for articulation maps <style date="0.0" name.ref="my initial style" defaultArticulation="nonlegato"/>) at the beginning of of the map. The corresponding code changes are in classes meico.mei.Mei, meico.mpm.maps.ArticulationMap, DynamicsMap, GenericMap, MetricalAccentuationMap, RubatoMap, TempoMap.
In class meico.mpm.Mpm element referenceMusic is renamed to relatedResources and element reference has been renamed to resource.

v0.7.2

Bugfix in meico.mei.Mei.addArticulationToMap() so it really generates articulations.

v0.7.1

Extended the comandline application meico.app.Main, added flag [-ex], [--expressive], so it does export expressive MIDI and audio.

v0.7.0 Music Performance Markup (MPM) API Integration

Updated XOM to version 1.3.2. Updated the Ant script build.xml accordingly.
New format added: Music Performance Markup (MPM):
- The corresponding package is meico.mpm. This package contains the full API to generate, edit, store and parse MPM data and render them to expressive MIDI sequences.
- Added several overloaded methods meico.mei.Mei.exportMsmMpm() which return two lists, one with the MSMs, the other with the corresponding MPMs.
- New methods in class meico.mei.Mei:
  - processDynam() and addDynamicsToMpm() are used for converting MEI elements dynam and hairpin to MPM.
  - processTempo() and addTempoToMpm() are used for converting MEI tempo elements to MPM.
  - processArtic() and addArticulationToMPM() are used for converting MEI articulation data (in elements artic, note and chord) to MPM.
  - processBreath() is used for converting MEI breath elements to MPM.
  - processSlur() and meico.mei.Helper.checkSlurs() are used to convert MEI slur elements to MEI slur attributes and ultimately to MPM legato articulations.
- Meico's processing of MEI note and chord elements has been extended to support articulation, i.e. attributes artic and artic.ges.
- New additions in class meico.mei.Helper: mpmPostprocessing(), list tstamp2s, parseTempo(), updateMpmNoteidsAfterResolvingRepetitions().
- Added MPM to the graphical user interface via class meico.app.gui.DataObject.
- In MEI tempo is mostly associated only to the staff where it is printed even though it applies to all parts. There are several ways to encode the association, e.g. by part="%all". If such is not specified meico will create only a local MPM tempoMap. The resulting performance will sound "surprising" as the parts become asynchronous. To cope with this in the way it might have been intended (all parts follow the same tempoMap) the GUI representation of an MPM object offers the option to make all local tempi global, i.e. merge all local tempo maps into one global tempo map.
- Resolving sequencingMap in the GUI is also applied to the sibling MPM object.
- The commandline application in class meico.app.Main has been extended accordingly.
To preserve conformity between MSM and MPM the following MSM attributes have been renamed: midi.date into date, midi.duration into duration, end into date.end.
New additions to class meico.msm.Msm:
- renderMidi() holds the actual algorithm that is invoked by the exportMidi() method and is extended by methods for generating MIDI from expressive data (e.g., milliseconds dates that have been computed from class meico.mpm.elements.Performance).
- exportExpressiveMidi() is used to generate and export expressive MIDI data.
- parseChannelVolumeMap() is used to render a part's channelVolumeMap into a sequence of MIDI channelVolume control change messages. That map is generated during performance rendering in method meico.mpm.elements.Performance.perform() and added to augmented MSM that it returns.
- parseProgramChangeMap(), these maps can be used to add MIDI program change events and to keep consistency when the MSM is generated from a MIDI file; the method generates the corresponding MIDI events during MSM-to-MIDI export.
- convertPulsesPerQuarter()/convertPPQ() is used to match the timing basis of the MSM object with the timing basis of a performance. It can be used in other contexts as well to change an MSM's timing basis.
- fitVelocities(), computeSemicircleCompression(), computePartwiseCompression are used when the range of velocity values goes beyond the MIDI specification [0, 127].
Changed the method signature of meico.mei.Mei.convert() to void. The result of the conversion is accessed via meico.mei.Helper.movements anyway. Method meico.mei.Mei.exportMsm() has been adapted accordingly.
MEI preprocessing before conversion to MSM/MPM got an additional method meico.mei.Mei.removeRendElements(). This replaces all rend elements by their contents which reduces on-the-fly processing effort. These elements are an optional intermediate layer and not relevant for this particular conversion.
Added class AbstractXmlSubtree to package meico.xml.
Added package meico.supplementary for classes that are not specific to but useful across several other classes.
- First addition to this package is class KeyValue that represents data tuplets.
- Second addition is class RandomNumberProvider. It offers several distribution types: uniform, Gaussian, triangular, Brownian, Compensating Triangular, and distribution list. The provider generates a consistent series of pseudo random numbers that is accessed via an index. The index can be floating point, this returns a linear interpolation of the neighboring integer index positions. The randomization can be reseeded. The random number series can be exported as meico.audio.Audio object and, thus, stored to the file system as .wav or .mp3 file.
Moved activation and deactivation methods and flag from classes meico.app.gui.Schema, meico.app.gui.Soundbank, meico.app.gui.XSLTransform to class meico.app.gui.DataObject as they all do the same and non-activatable data objects can simply ignore this functionality. Respective code in class meico.app.gui.Workspace has been adapted.
Applied slide changes to the graphical user interface's color scheme of data objects (which is computed in meico.app.gui.Settings.classToColor()) for better discriminability of different types of data objects.
New additions to class meico.mei.Helper: indexNotesAndChords(), getCurrentTimeSignature(), tstampToTicks(), computeControlEventTiming(), parseTempo(), reorderMeasureContent(), isSameLayer(), getStaff(), getStaffId(), checkSlurs(), addSlurId().
Methods meico.mei.Mei.reorderElements() and resolveTieElements() have been removed.
- They did not take care of critical apparatus, choice, etc. The mechanism to reorder MEI control events according to attribute startid has been integrated with method meico.mei.Mei.processMeasure/meico.mei.Helper.reorderMeasureContent() and meico.mei.Helper.computeControlEventTiming(). This solves the aforementioned problem and is more efficient than the preprocessing procedure was.
- Processing of MEI tie elements has been redone with methods meico.mei.Mei.processTie(), meico.mei.Helper.getTie() and checkTies() and integrated with methods meico.mei.Mei.processNote() and processChord().
Method meico.mei.Helper.computeDuration() has been made more flexible. So far, it refused to compute anything as long as the MEI element was not within a staff environment. This, however, is only necessary if the element has no dur attribute. If that attribute is present the duration can be computed even outside of the staff environment - as the method does now.
Enahncements in method meico.mei.Helper.computePitch():
- Bugfix: The end of transpositions included the first note after the transposition.
- Enhancement: For transpositions and octavings attribute layer is now taken into account, even if multiple layers are specified in it.
The signature of methods meico.mei.Helper.copyId() has changed. They produce a return value which is the Attribute they generate.
Method meico.mei.Mei.makeMovement() has been extended. It will now keep a link to the corresponding work element in meiHead/workList. This is used during conversion to find time signature and tempo information if missing at the respective point in the music environment. After converting the contents of the mdiv method makeMovement() checks the existence of a global initial tempo in MPM. If missing, it is generated from the work's tempo element (if there is one).
Methods meico.mei.Mei.processPhrase(), processPedal(), processOctave(), processTupletSpan() have been redone. The processing of the corresponding MEI elements supports now attributes tstamp.ges, tstamp, startid, dur, tstamp2.ges, tstamp2, endid, part and staff.
MEI elements oLayer and oStaff have been added to the processing in method meico.mei.Mei.convert(). They are processed by the same routines as MEI layer and staff elements.
Method meico.msm.Msm.applySequencingMapToMap() has been updated to update also attributes date.end.
New additions to class meico.audio.Audio:
- convertByteArray2DoubleArray() makes analyses of audio data more convenient as it converts Audio object's byte array into an array of doubles between -1.0 and 1.0.
- convertDoubleArray2ByteArray() converts an input double array into a byte array.
Bugfix in method meico.audio.Audio.convertByteArray2AudioInputStream(): The computation of the length of the AudioInputStream did not take the number of channels from AudioFormat into account. This is fixed.
Time consumption analysis and commandline/logfile output have been added to all export methods.
Additions to the instruments dictionary: Oboe d'amore, Oboe da caccia and all clarinet names with an appended " in" so it matches better with, e.g., Clarinet in E and will not be confused with Clarino in.
Method meico.mei.Mei.processMeasure() has been extended. After processing its contents and if the measure's length does not confirm the underlying time signature, intermediate timeSignature entries are added to the global MSM timeSignatureMap so that it follows the measure's timing.
Method meico.msm.resolveSequencingMaps() did not expand global maps so far. This has been added. It will now also return a HashMap with the xml:id strings that have been extended to avoid multiple IDs in one XML document. This HashMap is used to update the noteid attributes in MPM articulationMaps because the repetitions are also expanded in MPM (if there is one that is linked to the MSM).
Method meico.mei.Helper.cloneElement() does now also clone the namespace URI.
In method meico.app.gui.DataObject.addSeveralChildren(), which is executed whenever more than one data object is created, a slight spiral effect has been added so that the overlapping of circles is a bit reduced.
In class meico.app.gui.DataObject, method reloadMei() has been renamed to reload() and extended so that it can also be used to reload MSM and MPM data. This functionality has also been added to the GUI, i.e. the radial menu of both object types.
New additions to class meico.midi.EventMaker:
- method createControlChange(),
- method byteArrayToInt().
In class meico.midiMidi2MsmConverter in method processShortEvent() noteOn velocity has been added to the MSM note elements, so it can be further incorporated in MPM performance rendering (as far as it is not overwritten by a dynamicsMap).
New Addition to class meico.midi.Midi: method getTempoMap() parses the MIDI sequence, collects all tempo events and generates an MPM tempoMap from it.
In package meico.app a new class has been added, called Humanizer. It demos a little bit of the MPM functionality by generating some basic humanizing and applying it to a Midi object. It is also integrated in the graphical user interface, just import or create a MIDI object and to the click the new option "Humanize (experimental)" on the right part of its radial menu.
Added the full JavaDoc of meico to the repository.
Verovio update to v2.4.0-dev-facbfa6.

v0.6.12

Fixed license information for Saxon in README.md. Thanks to Peter Stadler!
Made several classes in package meico.app.gui package-private as they will never be accessed from outside the package and are not intended to.
Made class meico.msm.MsmBase abstract and renamed it to AbstractMsm.
Removed MSM's global header element pulsesPerQuarter. Instead an eponimous Attribute has been added to the root note of the MSM.
New additions to class meico.xml.XmlBase: Methods removeAllElements(String localName) and removeAllAttributes(String attributeName) can be used for processing of all XML based formats.

v0.6.11

New conversion option: MIDI to MSM.
- New method meico.midi.Midi.exportMsm() implemented.
- The actual conversion is implemented in class meico.midi.Midi2MsmConverter. To use it, instantiate it with its constructor, then invoke convert(), see method meico.midi.Midi.exportMsm() for sample code.
- Standard MIDI file formats 0, 1 and 2 are supported.
- Relevant MIDI events that are parsed into MSM data are: NOTE_OFF, NOTE_ON, PROGRAM_CHANGE, META_Track_Name, META_Instrument_Name, META_Marker, META_Midi_Channel_Prefix, META_Midi_Port, META_Time_Signature, META_Key_Signature. More may be added with future updates, e.g. META_Lyric.
- META_Track_Name and META_Instrument_Name events as well as PROGRAM_CHANGE events are incorporated to create meaningful MSM part names.
- New method midi2PnameAndAccid() in class meico.mei.Helper that converts a MIDI pitch to a pitch name string and an MSM-conform accidentals string.
- Added methods getInstrumentName() and a String array with the GM standard instrument names to class meico.midi.InstrumentsDictionary. Given a program change number, it retruns the instrument's name, i.e. either the standard GM names or the first string that is associated with this program change number in the dictionary.
- Made methods meico.mei.Helper.msmCleanup() public to be accessible from class meico.midi.Midi.
- The conversion option for MIDI objects in the graphical user interface has been added in class meico.app.gui.DataObject.
Updates in class meico.msm.Msm:
- Class meico.msm.Msm got a static method createMsm() that creates a minimal Msm instance with the basic xml markup. This simplifies the code in method meico.mei.Mei.makeMovement().
- Moved method meico.msm.MsmBase.getParts() to class meico.msm.Msm as it is different in a future implementation of the format MPM (Music Performance Markup).
- Added new methods to class meico.msm.Msm: addPart(), makePart(). The latter extends the eponimous methods in class MsmBase with some Msm-specific map creations that will be different in MPM. Some adaptations in method meico.mei.Mei.makePart() have been done in accordance to this.
- The MIDI export in class meico.msm.Msm has been extended a little bit.
New additions to the instruments dictionary: Superior, Superius, Contratenor, Clarino, Clarino in, Clarini, Clarini in, Ocarina, Gefäßflöte, and Kugelflöte. Many thanks to Richard Freedman for his suggestions.
Bugfixes
- In method meico.mei.Helper.computePitch() the octave of preceding accidentals was not correctly recognized.
- accid elements that occur in transposing staffs/layers are not assigned to the correct pitches and octaves due to the transposition context. This has been fixed in method meico.mei.Mei.processAccid() by adopting the untransposed attributes pname and oct (non-gestural) from the parent note.
- In method meico.mei.Mei.processDot() an incorrect condition has been corrected.
- In method meico.msm.Msm.parseKeySignatureMap() the computation of accidentals was corrected.
Added some commandline/logfile output to all export methods for better readability.
Added some missing MIDI meta messages to class meico.midi.EventMaker.

v0.6.10

Added support for MEI attribute sameas to class meico.mei.Mei in method resolveCopyOfs(). It is interpreted in the same way as attribute copyof, i.e. all attributes and children of the referred element are copied over to the referring element.
- Added method meico.mei.Mei.resoveCopyofsAndSameas() which ultimately just invokes resolveCopyOfs() but has a more appropriate naming.
- Classes meico.app.Main and meico.app.gui.DataObject as well as files README.md and documentation.md have been adapted accordingly.

v0.6.9

Added a new commandline option to meico -n/--ignore-repetitions. This should be used to prevent the expansion of repetition marks. It should solve the situation when expansions and repetitions in MEI are used redundantly and meico (commandline) would do it twice.
Fixed bug on the settings window of the gui app (class meico.app.gui.Settings). JavaFx's Spinner class does not commit a value when changed via text input. Thus, whenever a value (e.g. the tempo) was changed this way, the user had to press ENTER to commit. To fix this an event listener has been added that forces the commit when the value changes even without the need to press ENTER.
The window for preferences settings is made resizable and scrollable. This will hopefully workaround the limited window size issue that some users experience on their machines.

v0.6.8

Reverted the JavaFX update from v0.6.7 to keep compatibility to OpenJDK 9.

v0.6.7

Reverted changes in verovio.html to v0.6.5 as this was more stable. Some experimental suff has been added that does not affect its performance.
A new package meico.svg with classes to hold SVG data has been added.
- It is also integrated in the graphical user interface.
- However, there is no generic SVG export from MEI, yet, even with Verovio.
JavaFX dependencies have been updated to version 12.0.1.
Internal Verovio update to v2.1.0-dev-b010e32.
Added configuration option scoreFont (default value is Leipzig) to set Verovio's rendering font. To set another font, file meico.cfg must be edited. It is no yet built into the preferences page of the GUI.

v0.6.6

Minor revisions in verovio.html.
Updated internal Verovio to v2.1.0-dev-865f210.
Added measure elements to the addIds functionality of class meico.mei.Mei.

v0.6.5

.xml import and type recognition now supported: Added method meico.app.gui.DataObject.readXmlFileToCorrectType(). It is called when a .xml file is loaded. So far, meico rejected to load such files as it was unclear which kind of data it holds. The new method loads it as an XmlBase object and reads its root name to find out whether it is an MEI, MSM, MusicXML, or XSLT. An instance of the corresponding type is then created.
Added floating point support to time signatures in methods meico.mei.Helper.getOneMeasureLength() and in class meico.mei.Mei methods processMeasure(), makeTimeSignature(), processBeatRpt(), processMRpt2(), and makeMeasureRest().

v0.6.4

Bugfix in meico.mei.Mei.processAccid().
Added error catching in methods meico.mei.Helper.computePitch() and meico.mei Helper.computeDuration().

v0.6.3

Bugfix in commandline mode meico.app.Main. It forgot to make pitch and chroma export.
Enhancement in class meico.mei.Mei methods processStaffDef(), processStaff(), processLayer() to support nested structures (staffDef within staff etc.).
Updated internal Verovio to v2.1.0-dev-533442f.

v0.6.2

Updated internal Verovio to v2.0.0-dev-61da81a.
Added package and class meico.xml.XmlBase as a base class for all XML-based classes in meico.
- Refactored class meico.msm.MsmBase accordingly.
- Class meico.mei.Mei has been refactored, too, to extend XmlBase.
- Disabled fetching of DTD in method meico.xml.XmlBase.readFromFile() as this causes problems in XOM preventing parsing XML files with a DOCTYPE declaration.
Added floating point support for transpositions in MEI.
Added class meico.musicxml.MusicXml.
- So far, it is just a dummy class that parses uncompressed MusicXML, writes to the file system, offers XSL transform, validation and access to the data ... standard XML functionality in meico. There are currently no export methods to convert to or from MusicXML.
- .musicxml files can be imported in the GUI app. XSL transform and validation are fully functional.
- This will hopefully grow further in the future.

v0.6.1

Added new methods to class meico.midi.Midi: getPPQ(), getTickLength() and getMicrosecondLength.
Minor corrections in the constructor methods of classe meico.midi.Midi.
Added new method variant of meico.mei.Helper.validateAgainstSchema() that takes an input string instead of a file. With this validation does not require the data to be present in the file system.
Note: We did some experiments with XML schema files in XSD format. However, meico uses the Saxon 9 HE version which supports only RNG schema files for validation, in contrast to the EE version. Thus, XSD files should be converted to RNG format to be used in meico.
Added new class meico.msm.MsmBase which forms the base class for MSM and (later on) MPM classes. Hence, class meico.msm.Msm is now refactored to extend MsmBase.
- Method meico.mei.Mei.makePart() has been edited to utilize the makePart() functionality of MsmBase.
- Added new method meico.msm.MsmBase.validate() to validate the MSM and MPM code against a specified schema. Though, at the moment there is no corresponding schema definition, at least for MSM.

v0.6.0

Added System.setProperty("prism.order", "sw"); to method meico.app.gui.MeicoApp.init(). This fixes a graphics glitch that occurs every now and then.
Meico's MIDI to audio renderer relies on the package sun.com.media.sound. However, since Java 9 this package is marked as deprecated. It was still accessible at runtime but is going to disappear from Oracle JDK in the near future. It seems to have disappeared from OpenJDK as well.
- To solve this the Gervill Sound Synthesizer gervill.jar has been added to the externals. It provides the required package, so no code changes were necessary.
- Since it is published under GNU GPL 2.0, we have to change meico's license model as well. The new license is GNU GPL 3.0.
Some JavaFX 11 modules had to be added, too, as it is no longer included in any JDK (neither Oracle nor Open): javafx.base.jar, javafx.controls.jar, javafx.graphics.jar, javafx.media.jar, and javafx.web.jar.
- These are also licensed under GNU GPL 2.0.
- In GUI mode, JavaFX version number has been added to the log file/commandline output at startup.
Because of incompatible licensing models we had to remove the MEI Common Music Notation Schema mei-CMN.rng from this project.
- Instead, RNG files can now be imported and used in the same way as XSLTs and soundfonts, i.e. drag and drop it into the workspace, activate it and validate the MEI.
- Classes meico.mei.Mei, meico.app.gui.Settings, meico.app.gui.Workspace, meico.app.gui.DataObject, and meico.app.Main had to be adapted.
- New class meico.app.gui.Schema has been added.
- It is possible to set a default schema that meico will remember with every restart. Once this is done, meico behaves in the same way users of previous versions are used to.
Updated copyright notice in class meico.midi.Midi2AudioRenderer and the license information in README.md.

v0.5.5 Verovio Integration

Added a welcome message in the workspace: "Drop your files here: MEI, MSM, TXT, MIDI, WAV, XSL, SF2, DLS." and a file drop icon. This should clarify the first step of meico's usage to every beginner and provides a list of file formats that can be imported. The whole thing is responsive to window height, i.e. resizing the window will adjust the scale of the message. It will disappear after successfully dropping/importing the first file.
In class meico.app.gui.Settings there were some InputStreams that have not been closed. This has been fixed.
Disabled the option to switch off the internal WebView. Not all information shown internally can be forwarded to an external browser.
Verovio integration:
- The motivation behind adding the webview to the GUI was to show Verovio's score renderings in it. This is now finally implemented.
- Added a prototype HTML document /resources/Verovio/verovio.html. It contains a placeholder "MeiCode" which will be replaced by actual MEI code.
- The new class meico.app.gui.VerovioGenerator provides the necessary methods to generate an HTML code that calls Verovio and passes the MEI code to it.
- Classes meico.app.gui.DataObject and meico.app.gui.WebBrowser have been adapted.
- In class meico.app.gui.Settings a new flag oneLineScore has been added. If true, the score rendering will print all music in one system. This can be specified by the user in the settings.
- In the settings the user can decide whether to use the local version of Verovio that is packed into meico's jar or the latest online available version (requires internet connection, of course).
- Do not expect too much, Verovio works suboptimal in Java's JavaScript engine.
Whenever something is shown in the WebView, i.e. when clicking on "Score Rendering" or "Show",
- the WebView window will expand automatically and
- its title string will change to express what is shown.
If an MEI or MSM does not provide a title, its visual representation in the GUI will be an empty circle. This has been changed. If the title string is empty, the filename will be printed.
Class meico.app.gui.WebBrowser has extended VBox which cased a problem when resizing the window. The render area did not resize. This has been fixed by extending StackPane instead of VBox.
Added two new methods prettyXml() and repeatString() to class meico.mei.Helper to generate a formatted XML string from an unformatted one, basically for printing MEI and MSM code in the WebView. The corresponding options have been added to their menues.

v0.5.4

Some tweaks in the Travis CI script .travis.yml. Because of bad OpenJFX support Travis CI reports build fails with OpenJDK. At the moment only the Oracle JDK builds can be trusted.
Finished the MEI Coverage Documentation documentation.md.
Some minor code revisions, nothing essential.

v0.5.3

Bugfix in method meico.mei.Mei.readMeiFile(): If argument validate is set true, it was trying to validate the MEI before it was actually loaded.
Generated an up-to-date Ant script build.xml and added <manifest> <attribute name="Main-Class" value="meico.app.Main"/> </manifest> to ensure that there is a main manifest attribute.
Thanks to David Weigl for reporting these issues!

v0.5.2

So far, XSL transform functions of meico did support only XSLT 1.0 and 2.0. In some Java versions also 3.0 stylesheets worked but not in general. This issue has been solved.
- Update Saxon to version 9.8.0.14 HE.
- Due to signature issues the files TE-050AC.RSA and TE-050AC.SF had to be removed from the META-INF folder of saxon9he.jar.
- In class meico.mei.Helper all XSLTransform processing methods have been redone and new ones have been added in order to overcome the afformentioned issues. XOM and Java were accessing Saxon's old transformer functionality only which does not support XSLT 3.0. The reworked versions access Saxon directly now and use its Xslt30Transformer for all stylesheets. Classes meico.mei.Mei, meico.msm.Msm, meico.app.gui.XSLTransform, meico.app.gui.Workspace, and meico.app.gui.DataObject have beed adapted accordingly.
- Some further optimizations to XSL transforms have been implemented, esp. in classes meico.app.gui.Settings and meico.app.gui.DataObject.
Added a custom meico icon to the window titlebar. It replaces Java's default icon. This and further icon files have been added to resources/figures.
When closing objects in the workspace the garbage collector does not seem to free their allocated memory automatically. A call of System.gc() has been added to class meico.app.gui.Workspace method clearAll() to force the garbage collection.
When changing the settings for accordion animation and auto expansion of the player a restart is no longer necessary necessary.
Added method main() to class meico.app.gui.MeicoApp so it can be compiled and run as self-contained JavaFX application.

v0.5.1

Bugfix: make logfile when checked in the settings.
If a file drop fails, the exception message is sent to the statuspanel.
The conversion option "Score Rendering" has been removed from MEI menu as long as Verovio integration is not yet functional.
Updated README.md.

v0.5.0

New graphical user interface:
- The new desktop application is located in package meico.app.gui in class MeicoApp.
- Lots of new file formats are droppable. Here is an overview of all supported file extensions: .mei, .msm, .mid, .wav, .txt, .xsl, .sf2, .dls.
- In addition to these import formats there are the following export formats that cannot be imported: .mp3, .json (encodes pitch/chroma information).
- Radial menus provide access to all operations that can be applied to the different data types. As a convenience shortcut MIDI and audio playback can be triggered by doubleclick. Soundbanks and XSLTs can also be activated via doubleclick.
- The following stuff has been deleted from the project as they are no longer required:
  - classe meico.app.MeicoApp has been removed,
  - class meico.app.FileDrop has been removed,
  - the layout manager MigLayout has been removed from externals,
  - all the graphics from the old GUI have been removed from the resources/graphics folder.
- Font Awesome has been added.
- Meico uses the default system font. Layouting reacts on different font measurements.
- Added keyboard input to trigger playback: SPACE (does not work on all systems), ENTER and the play/pause key (one of the extra media keys on some keyboards).
- All operations are now processed in seperate threads. This prevents interface freezing and allows to run several operations in parallel. While an operation is processed, a "computing/please wait" animation is shown on the corresponding data item.
- A separate window offers some preferences settings to customize meico a little bit and preload certain soundbanks and XSLTs. However, most of the settings will become active only after restarting meico. All settings are stored in a file meico.cfg when closing meico and restored at the next startup. The file will be generated if not yet existent.
Class meico.Meico got two new static methods launch() and launch(String windowTitle, String logFileName). Applications can conveniently launch meico's graphical user interface by calling one of these methods, e.g. Meico.launch() or Meico.launch("My window title").
Some revisions to classes meico.midi.MidiPlayer and meico.audio.AudioPlayer to ensure data integrity and correct feedback on method call isPlaying() (esp. in AudioPlayer). Class MidiPlayer got also two further getter methods getMicrosecondLength() and getTickLength().
The output of method meico.mei.Mei.validate() has been changed from boolean to String. Now it returns the whole validation report. To get a boolean call validate() and then isValid().
Added lots of synchronizeds so that meico should run more stable in multithreaded environments.
Up to now, the MEI data was altered during conversion rendering it invalid. It has no use except for debugging purposes. We now ensured, that the original version is reset in method meico.mei.Mei.exportMsm(int ppq, boolean dontUseChannel10, boolean ignoreExpansions, boolean cleanup) after the conversion process. The altered version is kept only if attribute cleanup is set false (debug mode).
XOM library has been updated to version 1.2.11.
Known issue: Loading XSLTs does not work on several Java versions. The issue seems to originate from the XOM library. In tests with Java 1.8.0_172 everything works fine. So at the moment this is the recommended Java version for running meico, at least regarding the use of XSLTs. everything else works alo in later versions.

v0.4.0

Added NullPointerException to audio rendering Exception handling in meico.app.MeicoApp, subclass Midi4Gui.
MIDI playback overhaul:
- Extracted all MIDI playback related parts from meico.midi.Midi to new class meico.midi.MidiPlayer. Class Midi holds the data and its processing methods, class MidiPlayer provides playback and synthesis functionality.
- Removed all MIDI playback methods from class Midi. Hence, this part is no longer backwards compatible.
- Class MidiPlayer features lots of new getter, setter and play methods.
- An application that wants to play MIDI data should do this:
```
MidiPlayer player = new MidiPlayer();
player.loadSoundbank(soundbank); // this is optional; soundbank is a File or URL object
player.play(myMidi);             // myMidi is an instance of Sequence or meico's Midi class
... music plays ...
player.stop();
player.close();                  // if not needed anymore, close it
```
- Soundbanks can now be loaded and applied to MIDI playback. In GUI mode, users do not have to render audio to get the "high-quality" sound output. Hence, setup of the soundbank has been shifted to the MIDI name (right click). Here users can select the .sf2 or .dls file to be used or switch back to Java's default soundbank. It is even possible to switch the soundbank during playback.
- The corresponding parts of meico.app.MeicoApp have been adapted. There is no longer a player for each MIDI instance but only one global MidiPlayer instance that is fed with the MIDI data (either a Sequence object or a Midi object) to be played back.
Audio playback overhaul:
- Extracted all audio playback related parts from meico.audio.Audio to new class meico.audio.AudioPlayer. Class Audio holds the data and its processing methods, class AudioPlayer provides playback functionality.
- Removed all audio playback methods from class Audio. Hence, this part is no longer backwards compatible.
- Class AudioPlayer features lots of new getter, setter and play methods.
- An application that wants to play audio data should do this:
```
AudioPlayer player = new AudioPlayer();
player.play(myAudio);   // myAudio is an instance of meico's Audio class
... music plays ...
player.stop();
```
Added method exportAudio(URL soundbankUrl) to class meico.midi.Midi so that soundbanks do not have to be local files and URLs do not have to be decoded to files by the application.
Slight revisions to class meico.audio.Audio to ensure data integrity after MP3 conversion.
A note concerning MIDI to audio rendering: Meico's MIDI to audio renderer relies on the package sun.com.media.sound. However, Java 9 and later versions do no longer provide access to this package at compile time. It is still accessible at runtime. Hence, meico should be compiled with Java 8 and can run with later versions (tested until Java 10). But at some point they will probably make this package inaccessible also at runtime. A workaround for this is using the Gervill Sound Synthesizer (search gervill.jar in the internet and add it to externals) that provides the required package, so no code changes are necessary. However, consider that Gervill is licensed under GNU GPL-2.0 while meico is under GNU LGPL-3.0!

v0.3.8-rev

Never trust automated refactoring. Some strange side effects have been fixed.

v0.3.8

Added library JSON.simple v3.0.2
Switched the output of class meico.pitches.Pitches to JSON format. The default output file extension will also be .json from now on.
The whole data structure of pitch (and chroma) data has been revised. Some new classes have been added to package meico.pitches, namely FeatureVector and FeatureElement.
To make the pitches data structure and output file as memory efficient as possible, the timing resolution is reduced to the minimum ppq necessary to preserve accurate rhythm and note durations. MSM's ppq remains unchanged!
Previos function calls stay the same to ensure backwards compatibility. Hence, we do not increment the beta version number.
New methods getParts(), getPPQ() and getMinimalPPQ() in class meico.msm.MSM.

v0.3.7

Updated Saxon parser to version 9.8.0.11 HE.
Made the v0.3.6 fix a bit safer.

v0.3.6

Fixed missing accid.ges support in meico.mei.Helper.computePitch() for preceding accid elements.

v0.3.5

Another bugfix: processing of accid elements preceding to a note element has been fixed.

v0.3.4

Little bugfix in meico.mei.Mei.processAccid(). In case of note elements with accid children that do not provite an oloc attribute, the octave is read from the note. Now it is done correct.

v0.3.3

Updated meico.mei.Mei.processNote() so that first its child elements (accid, dot) are processed before processing the note itself.
Extended processing of accid elements to look for parent notes in case the oloc or ploc attribute are missing.
New method added meico.mei.Mei.processDot(): dot elements have been processed directly during the processing of note and rest elements which lead to not considering the critical apparatus elements and, hence, not recognizing dots within that environment. This should be fixed now.

v0.3.2

In window mode the checkbox "Do not resolve expansions" has been renamed to "Resolve expansions". This should be more intuitive than checking a negated statement.
More documentation has been added.
The root element of MSM documents has been renamed from meta to msm.
During MEI-to-MSM conversion, when resolving MEI elements beatRpt, halfmRpt, mRpt, mRpt2, and multiRpt, elements with duplicate IDs were created. This is taken care of now.
Added a new method to class meico.mei.Mei that returns the title of the music, getTitle().
Method meico.mei.Mei.makeMovement() has been extended. It creates now also a title attribute in the MSM root element msm. That title attribute is a concatenation of the work's title and the mdiv element's attributes n and label.

v0.3.1

Added class meico.Meico that holds the version number of meico. It can be accessed via Meico.version.
Added a new package meico.pitches with classes Pitches and Key.
Added new methods to class meico.msm.Msm:
- getEndDate() returns the date of the last note offset, i.e. the length of the music in MIDI ticks.
- exportChroma() converts MSM to a sequence of chroma features with 12 semitones in equal temperament and A = 440 Hz.
- exportPitches() converts MSM to a sequence of absolute pitch vectors with 12 semitones per octave in equal temperament and A = 440 Hz. This conforms with the MIDI standard, i.e. 0 is the lowest and 127 the highest possible pitch. This method is overloaded. The more general version of this method takes an instance of meico.pitches.Key as parameter.
Some adds to the commandline app:
- Added new option -o and --chroma to get chroma export.
- Added new option -h and --pitches to get absolute pitches export.
- Added the current version number to the output of option -?/--help.
- File README.md has been updated accordingly.
Chroma/pitches export has also been added to the window mode gui, available via right click on an MSM object.
File README.md has been updated with the new pitches/chroma functions.
Redirected several error messages to System.err instead of System.out. This makes output in the commandline and log file more consistent.

v0.3.0

Two new types of maps have been added to the MSM format, sectionMap and phraseMap. Their contents derive from section and phrase elements in MEI. They indicate musical sections and phrases. The MEI-to-MSM conversion has been extended by the corresponding routines (meico.mei.Mei.processSection() and meico.mei.Mei.processPhrase()).
Added a new method meico.mei.Helper.getMidiTimeAsString() which is useful to avoid unnecessary String-to-Double-to-String conversions.
Added support for MEI expansion elements.
- New methods added to class meico.mei.Mei: resolveExpansions(Element root) and resolveExpansions(). The latter is public and can be called by applications to convert an MEI with expansion elements into a "through-composed" MEI without expansion elements.
- A new parameter ignoreExpansions has been added to method meico.mei.Mei.exportMsm(int ppq, boolean dontUseChannel10, boolean ignoreExpansions, boolean msmCleanup). So meico can be forced to convert the MEI data either as it is or in its rearranged form as indicated by expansion elements. There is also a method meico.mei.Mei.exportMsm(int ppq, boolean dontUseChannel10, boolean ignoreExpansions), if you have used a previous version of meico be sure to check consistency with your exportMsm() calls as there is a slight backwards incompatibility at this point!
- A new parameter (-e, --ignore-expansions) has been added to the commandline app.
- The Python demo meicoPy.py got the same parameter now.
- In the window app a checkbox has been added to the MEI-to-MSM conversion options saying Do not resolve expansion elements.
- The REST api has also been updated and features the new parameter ignore_expansions.
The resolution of MSM sequencingMaps, i.e. repetitions in MEI, has been redone and should work properly now.
- Method meico.msm.Msm.applySequencingMapToMap() has been rewritten.
- Class meico.msm.Goto has a second constructor method Goto(Element gt) which is much safer and more convenient than Goto(double date, double targetDate, String targetId, String activity, Element source). It features also an new method isActive() that is used during the
MEI staffDef elements do not necessarily need to have an attribute label but could also have a child element label. Support for this latter type has been added to method meico.mei.Mei.makePart().
Continuo has been added to the instruments dictionary as an instance of Harpsichord.

v0.2.24

Added MEI section elements to method meico.mei.Mei.addIds(), so sections without an id get one.
Added method meico.mei.Mei.processSection() to experiment with interpreting MEI sections as potential repetition starts. But sections cannot generally be interpreted this way. So this function has been commented out again.
Initiated an MEI Coverage Documentation in documentation.md. Detailed descriptions need to be added in the future.

v0.2.23

MSM movement ids had no namespace. Now they are in the xml namespace.
Repetitions started always at an rptstart or the beginning of the piece. End barlines where ignored, so far. Meico now interprets <measure left/right="end"> as a potential repetition start.

v0.2.22

Bugfix in meico.mei.Mei.processApp().
Bugfix in meico.mei.Mei.processLayer().
Added method meico.mei.Helper.getFirstChildElement(Element ofThis, String localname). It is a workaround for the XOM method getFirstChildElement(String name) which sometimes does not seem to work properly.
Enhancements in the processing of choice elements.
Added support for restore elements.
- It negates all del children (by adding an Attribute restore-meico="true"). So the deletions will be considered during conversion.
- The processing of del elements has been enhanced, accordingly.
- But be aware, in our implementation a restore does not overrule a parent del element! Hence, putting a del around a restore effectively deletes the restoration.

v0.2.21

Added support for critical apparatus, i.e. the elements app, lem and rdg.
- This is part of the MEI-to-MSM conversion process in meico.mei.Mei.convert() and is implemented in function meico.mei.Mei.processApp().
- If an app element occurs, meico chooses the first (and hopefully only) lem element to process. All other child elements are ignored. If no lem is in app, meico chooses the first rdg element.
- If any other choice is desired, the user has to resolve this manually. A tool for generating "variant-free", unambiguous MEI code is the MEI Sequence Editor. This tool goes through all variants and lets the user make the decision. It then outputs the corresponding MEI file.
Added editorial element support, i.e. all the elements that can occur in the choice and subst environment.
- The elements sic and corr are processed in both cases of occurence, as "standalone" (always processed) and in the choice environment as sic-corr pair (corr is chosen).
- The same for orig and reg. In the choice environment reg is favored.
Added also the elements add, expan, supplied, unclear to the supported elements in MEI-to-MSM conversion. The del element is also processed now, but basically ignored.
The cert attribute (certainty) is not taken into account so far. And also the restore environment is not processed, yet.

v0.2.20

Some adds to the instruments dictionary.
Bugfix in Msm.applySequencingMapToMap().
- Only the first repetition was rendered correctly. Now also the later repetitions are correclty processed.
- Issue with duplicate xml:id's is solved.
Optimizations in Msm.resolveSequencingMaps().
Bugfix in GUI layout when loading a wav file.
The library Java-String-Similarity has been updated to v1.0.0.
- Updated Ant script build.xml accordingly.
Removed OracleJDK 7 from Travis CI builds .travis.yml as it is no longer supported by Travis CI. Java 7 compatibility can still be checked with OpenJDK 7.

v0.2.19

Changed MP3 encoding in method meico.audio.Audio.encodePcmToMp3() to Lame.QUALITY_HIGH.
Little additions to all README.md files.
Added method meico.midi.Midi.writeMidi(String filename).
The write... methods in classes meico.midi.Midi and meico.audio.Audio did not ensure that the file actually exists in the file system or is created if not. This has been fixed.
All write... methods in classes meico.midi.Midi and meico.audio.Audio return a boolean on the success of the file writing. Exception throwing has been removed. Classes meico.app.Main, meico.app.MeicoApp and meicoPy.py have been adapted accordingly.
Added a REST interface implementation (to be found in directory rest). Corresponding startup and usage documentation can be found in the README.md file at this directory.
Added requirements.txt to meicoPy.

v0.2.18

Added MP3 export to meicoPy.py.
Added more constructor methods in meico.mei.Mei and meico.msm.Msm to instantiate also from a Java InputStream.

v0.2.17

Added method getDocument() to class meico.mei.Mei and toXML() to classes meico.mei.Mei and meico.msm.Msm.
Bugfix in methods meico.mei.Mei.exportMei(), meico.mei.Mei.exportMsm() and meico.msm.Msm.exportMidi(): create filname only if source file name is given, otherwise create export object with null as filename.
Added new constructors to classes meico.mei.Mei and meico.msm.Msm that take the input code as Java String.
Added openjdk8, openjdk7, and oraclejdk9 to the TravisCI tests.

v0.2.16

In preparation of further application modes for meico package meico.app has been restructured.
- Entry point is class meico.app.Main method main(). The class also implements the commandline mode.
- The window mode (GUI) is implemented in class meico.app.MeicoApp. Note the slight change from MeiCoApp to MeicoApp!
- MANIFEST.MF was updated accordingly.

v0.2.15

Added MP3 export of PCM encoded audio data.
- Added Java LAME sources to package meico.audio. Meico is 3.98.4. License is LGPL 3.0.
- Added new methods to class meico.audio.Audio:
  - public byte[] encodePcmToMp3(byte[] pcm, AudioFormat format),
  - public byte[] getAudioAsMp3(),
  - public void writeMp3(), public void writeMp3(String filename), and public void writeMp3(File file).
- Commandline mode has been extended accordingly. The new option is -3 or --mp3 to get audio export as MP3.
- Window mode has been extended, too. Left click on the audio save button will output an MP3 file. Via right click, the user can specify an arbitrary filename. If the extension is .mp3 or .wav, audio will be stored in the corresponding format. In all other cases, the output is a Wave file, by default, but with the specified extension.
Method meico.msm.Goto.toXML() has been renamed to toElement() as it returns a XOM Element instance.

v0.2.14

The generated ids in method meico.mei.Helper.barline2SequencingCommand() could start numerical which is not XML conform. This is fixed.
Added methods to class meico.msm.Msm:
- public Document xslTransformToDocument(File xslt)
- public String xslTransformToString(File xslt)
Updated Ant build script.

v0.2.13

The XSLT-based new conversions from v0.2.12 were redone and generalized for several reasons.
- Licensing for the stylesheets is unclear/undefined. So they were removed from this repository. They can be obtained from the official MEI Encoding Tools GitHub page.
- Packages data, mods, marc, and mup where removed from this repository including all contained classes.
- The new export methods from v0.2.12 (see table) were replaced by two new, more generic methods in meico.mei.Mei: public Document xslTransformToDocument(File xslt) and public String xslTransformToString(File xslt). This allows users to apply any XSLT stylesheets and obtain the result either as XOM Document instance or Java String. This should be a more flexible, less restrictive solution. For conversion of an Mei instance myMei to MusicXML, the user obtains the file mei2musicxml.xsl and calls myMei.xsltTransformToDocument("path\\to\\mei2musicxml.xsl"). This returns the resulting Document that can be processed further or written to the file system.
New method writeStringToFile(String string, String filename) in meico.mei.Helper.

v0.2.12

Bugfix in commandline mode.
Reworked filename generation. New method meico.mei.Helper.getFilenameWithoutExtension(String filename).
Added Saxon v9.7.0.15 HE to the externals to process XSLT Stylesheets from the Music Encoding Initiative.

Added further conversions. These are using the Music Encoding Initiative's XSLT stylesheets from the MEI Encoding Tools GitHub page. However, they are a bit buggy sometimes ... and slow!

Conversion	implemented in method	comment
MEI to MusicXML	`meico.mei.Mei.exportMusicXml()`	buggy
MusicXML to MEI (v3.0.0)	`meico.data.MusicXml.exportMei()`	not functional, yet, because of XSLT syntax error
MEI to MARC	`meico.mei.Mei.exportMarc()`	requires more testing
MEI to MODS	`meico.mei.Mei.exportMods()`	requires more testing
MEI to MUP (v1.0.3)	`meico.mei.Mei.exportMup()`	requires more testing

A series of new Classes has been added accordingly: meico.data.MusicXml, meico.marc.Marc, meico.mods.Mods, and meico.mup.Mup.
Two new helper methods have been added to meico.mei.Helper:
- public static Document xslTransformToDocument(Document input, Document stylesheet) and
- public static String xslTransformToString(Document input, Document stylesheet).
These adds are not part of the window mode and meicoPy, yet, butt will be integrated in a future draw.

v0.2.11

Bugfix in meico.msm.Msm.resolveSequencingMaps().
Added meicoPy, a Python demo script. This demonstrates the usage of meico within Python. It is a reimplementation of meico's command line mode in Python.

v0.2.10

Some adds to the instruments dictionary.

v0.2.9

When creating MSM goto elements from endings, the elements get a temporal attribute n (derives from the respective MEI ending element which also has an n attribute). In MSM this attribute is only required for the conversion and should not be present in the final output MSM. Method Helper.msmCleanup() has been extended accordingly.
If an MEI ending has no attribute n, meico now checks for attribute label and takes this to search for numbering information. However, in case that both attributes are present, attribute n is preferred.

v0.2.8

Added method Msm.deleteEmptyMaps(). It removes all empty maps, i.e. all elements with a substring "Map" in the local-name (timeSignatureMap, keySignatureMap, markerMap, sequencingMap etc.), from the XML tree. This is to make the MSM file a bit smaller and less cluttered.
Added methods getElementAtAfter() and getElementBeforeAt() to class Msm, helper methods for navigation within maps.
Repetition support implemented in meico, see the following lines for details.

Added local and global sequencingMap elements to MSM. These hold information about the arrangement, i.e. repetitions, jumps etc. These will be encoded via elements marker (same as in the markerMap but with a UUID) and goto (uses the marker UUIDs to indicate jump target).

The marker attribute message describes the meaning of the marker:
<marker midi.date="..." message="..." xml:id="..."/>

`message=`	description
`"fine"`	the end mark of the piece; it is generated from MEI `measure`attributes `left/right="end"`
`"repetition start"`	indicates a possible jump target; it is generated from MEI `measure`attributes `left/right="rptstart"` or `left/right="rptboth"`
`"ending ..."`	this marker derives from an MEI `ending` element which starts at this position; the `n` or `label` of the ending are also given here

If an MEI measure's attribute left or right has the value "rptend" or "rptboth", an MSM goto element is generated and added to the sequencingMap. The format of the goto element is as follows:
<goto midi.date="..." activity="..." target.date="..." target.id="..."/>

Attribute	Description
`midi.date`	the position of the jump mark on the midi ticks timeline
`activity`	documents in a bit sequence when the `goto` is active and when it is inactive; e.g., `"1001"` would mean that the first time the playback reaches the `goto` it is active (do the jump), the next two times inactive (ignore it), then once more active, and from then on always inactive; for standard repetitions in music `activity="1"`; the attribute is optional; if it is missing it is assumed as `activity="1"` by default
`target.date`	the midi ticks position to jump to
`target.id`	the `xml:id` of the marker to jump to (the marker's `midi.date` should be equal to `target.date`)

Class meico.msm.Msm implements method resolveSequencingMaps() which the user can call to expand all other maps and the parts' scores according to the global and local sequencing information. This will delete all sequencingMap elements from the MSM tree as they no longer apply to the data. In case of a local sequencingMap a part ignores the global one. MEI-to-MSM conversion, however, generates only a global sequencingMap.
- Private method Msm.applySequencingMapToMap() has been added.
- Class meico.msm.Goto has been added to represent goto elements from the sequencingMap and make processing more convenient. Application developers cann ignore this class as it is only of relevance for meico's internal processing.
MSM tool to resolve sequencingMap elements has been added to window mode (MSM option "Expand Repetitions") and command line mode (here, it is done automatically).
If elements that have an xml:id are repeated/copied, the id is changed to [original id] + "_repetition".

Extended processing of MEI measure elements in method Mei.processMeasure().
- Attribute metcon is now taken into account if a measure is underfull. If metcon == "false", the measure can be shorter than what is defined by the time signature. An underfull measure with no metcon attribute or metcon != "false" will be filled up with rests. Overfull measures, however, will always be extended.
- Barlines of measures are encoded in attributes left and right. If these have sequencing-related information (rptstart, rptend, rptboth, or end) the respective information in the global MSM sequencingMap are generated. Therefore, the new method Helper.barline2SequencingCommand() has been added which is called from Mei.processMeasure().
Processing of MEI ending elements added via method Mei.processEnding().
- If there is only one ending, playback will skip it at repetition by default.
- Meico tries to realize the order of the endings according to the numbering in the endings' n attribute. This attribute should contain an integer substring (e.g., "1", "1.", "2nd", "Play this at the 3rd time!", but not "first" or "Play this at the third time!"). (Sub-)String "fine"/"Fine"/"FINE" will also be recognized. Strings such as "1-3" will be recognized as "1", this means that more complex instructions will not be recognized correctly due to the lack of unambiguous, binding formalization (meico is no "guessing machine"). If meico fails to find an n attribute or extract a meaningful numbering from it, the endings are played in order of appearance in the MEI source. Meico does not analyse attribute label; so the editor should always encode the numbering in attribute n.
- We tried to cover a variety of repetition and ending constellations but it is virtually impossible to cover all the crude situations that MEI allows (e.g., nested repetitions, repetitions within endings). So be not disappointed if some unorthodox situation from your special music encoding project does not work as expected.

v0.2.7

In MEI, global (score-wise) and local (staff-wise and layer-wise) key signatures can be mixed. Rule of thumb is, the latest key signature before a note is the one that has to be considered. So far, meico ignored global data if there was a local entry once. This lead to some wrong results if global entries come after local (e.g., at the beginning it may be encoded in staffDef elements but later in scoreDef elements; see, for instance, Hummel_Concerto_for_trumpet.mei in the sample encodings). This issue is now fixed. If local and global key signature information deviate from each other meico trys to add global data to the local keySignatureMap in MPM where necessary. However, this is done ad hoc in method Helper.computePitch() in a very local context. Hence, it is not 100% perfect. This means, if the necessity for local copies occurs somewhere within the piece, past keySignature elements will be missing until this point.
New method Helper.addToMap(). This is from now on used to insert new child elements into maps (sequential lists with elements that have an attribute midi.date) and ensure the timely order of the elements. All relevant methods in classes Helperand Mei have been adapted accordingly.

v0.2.6

Slight enhancements of Midi.play() and Midi.stop().
Some code polishing in classes meico.mei.Mei and meico.mei.Helper.
Better support of MEI layer elements during MEI-to-MSM conversion.
- New Helper methods: getLayer(), getLayerId(), and addLayerAttribute().
- Affected methods have been revised. All MEI-to-MSM conversion methods that generate note, rest, timeSignature, keySignature, transposition, dur.default, and oct.default elements in MSM add a temporary layer attribute that is deleted during Helper.msmCleanup().
- Method Mei.processRepeat() considers layers, i.e., if a repetition takes place within a layer environment (e.g., beatRpt), then only those elements are repeated that belong to this layer.
- Method Mei.processStaffDef() has been extended. So far, its child elements were ignored. Now, they are processed.
Bugfix in Helper.computePitch(). Partly (not always) wrong conversion of accidental string to numeric value has been fixed.

v0.2.5

Added method Helper.midi2pname().
Extended method Helper.pname2midi().
Changes to MSM accidental elements:
- Renamed attribute pitch into midi.pitch.
- Added attribute pitchname for better readability.
- Both attributes can be used equivalently. Method Helper.computePitch() checks for both, preferring midi.pitch over pitchname.
Removed files MidiDataInputStream.java, MidiDataOutputStream.java, MidiFileReader.java, MidiFileWriter.java, and ExtendedMidiFileFormat.java from package meico.midi. These were elements of the GNU Classpath project by Free Software Foundation. Since we dropped Java 6 compatibility these resources were no longer necessary. The corresponding methods readMidi() and writeMidi() have been redone.
Added exit codes for errors in command line mode.
Updated README.md.

v0.2.4

Added audio playback methods play() and stop() to class meico.audio.Audio.
Added audio playback button to the window mode graphical user interface.
- Ensured that all playback is exclusive, i.e. starting one playback will stop any other currently running playback both for midi and audio.
- Ensured that the playback of a Midi or audio instance stops when the instance is deleted or overridden.
Java 7 conform code polishing.

v0.2.3

Added Soundbank support for Midi-to-audio rendering.
- Instead of Java's default sounds the user can now freely choose a .dls or .sf2 file from the file system and use this for the synthesis of audio files.
- A corresponding conversion option has been added to the window mode. Just right click the Midi-to-audio conversion button and click the Choose soundbank option, then select a corresponding file from the file system. I recommend testing these SoundFonts.
- A command line option has been added: [-s "C:\mySoundfonts\mySoundfont.sf2"] or [--soundbank "C:\mySoundfonts\mySoundfont.sf2"] to choose a specific .sf2 or .dls file for higher quality sounds rendering.
Deleted method Midi2AudioRenderer.renderMidi2Audio(File soundbankFile, int[] patches, Sequence sequence).
Bugfix in class meico.midi.Midi: the sequencer has been opened in the constructor but was never closed. Now it is opened when method start() is called and closed when method stop() is called. Thus, it is only open during Midi playback.
Added Ant build script build.xml, thanks to Simon Waloschek.
Added Travis CI continuous integration system .travic.yml, thanks to Simon Waloschek.
Updated README.md.
Added Violoncello to the instruments dictionary.

v0.2.2

Fixed Midi-to-Audio conversion. Export of wave files works now.
Updated README.md.

v0.2.1

Fixed delay and "hiccup" in Midi playback when initializing and starting a sequencer of a Midi object for the first time.
Added content to method Audio.writeAudio(File file) (so far it was empty).
Added format data to class Audio. New getter methods have been added.
In class Audio audio data are no longer represented as AudioInputStream but as byte array. Constructors have been adapted. Class MeicoApp has also been adapted in subclass Audio4Gui.
Deactivated methods Audio.writeAudio() until byte-array-to-AudioInputStream conversion works properly.
Fixed issues with the playback buttons in window mode.
Updated README.md.

v0.2.0

Added subpackage graphics to resources and moved all graphics resources into it.
Added audio export in Wave format.
- Added new command line options ([-w] or [--wav]) to trigger wave export in command line mode.
- Modified Midi.exportAudio() (former Midi.exportWav()) to create and return an instance of meico.audio.Audio.
- Added several methods to class Audio. Audio data is now represented in an AudioInputStream and can be written into a file.
- Modified method meico.midi.Midi2AudioRenderer. Its rendering methods return an AudioInputStream object instead of directly writing a file into the file system.
- Extended the window mode graphical user interface to include the new functionalities.
- Updated README.md.
Instead of using one global midi sequencer for Midi playback in class meico.app.MeicoApp (window mode) I switched to the built-in local sequencers in class meico.midi.Midi.
Added tooltips in window mode for better user guidance.
Introduced some layouting variables in class meico.app.MeicoApp for better editing of the window mode graphical user interface via global variables.

v0.1.4

Added basic audio export to midi package (meico.midi.Midi2AudioRenderer.java).
Added UnsupportedSoundbankException.java to package meico.midi.
Added test audio output to command line mode.

v0.1.3

Renamed the element elements in the MSM format. In the timeSignatureMap they are called timeSignature, in keySignatureMap they are called keySignature and in the markerMapthey are now called marker.
Method Helper.computePitchOld() deleted.
Added method Mei.processAccid(), so accid elements are now processed not only as children of note elements (as until now) but also when they are siblings to note elements and the like. However, the attributes ploc and oloc are required to associate the accidental with a pitch.
Ids generated by meico (UUIDs) did not validate. This issue is fixed. Generated ids start with "meico_".
Added support for multiple body elements in an MEI music element. This is no valid MEI, though, but meico won't crash if it occurs anyway.
Added processing of incip, parts, and part elements.
Little bugfix with halfmRpt.
Added method Helper.pname2midi() as this functionality is used at several occasions.
Key signature processing (scoreDef, staffDef, keySig) in method Mei.makeKeySignature() has been redone.
- More cases and unorthodox/mixed key signatures are now covered, also in the MSM representation.
- Nonetheless, keyAccid elements require the pname attribute so that meico can associate the accidental with a pitch class.
- If not indicated by keyAccid elements, scoreDef, staffDef, and keySig require at least the key.sig or sig attribute to denote a key signature.
- Attribute key.sig.mixed or sig.mixed are also supported.
- The octave position of the key signature accidentals is ignored. It is not clearly defined if an accidental affects only this one octave or all octaves of that pitch class. In meico we decided to interpret it in the latter way.
- Modified method Helper.computePitch() to consider key signature accidentals.
The processing of chord elements (bTrem and fTrem are processed similarly) has been redone. If a chord element has no duration data in its attributes (dur, dots) and does not inherit it from a parent element, its duration is now specified by the longest child element.
Added Prinzipal, Soprano, Baritone, Euphonium, Chant to the instruments dictionary.
Bugfix in Mei.reorderElements(), relevant in the case that a startid attribute refers to an element within the element.
Minor corrections in MeicoApp.commandLineMode().

v0.1.2

Bugfix in command line mode: missing path when writing "-debug.mei" and the file has been loaded via relative path.
Added S., A., T., B. to the instrument dictionary for ChoirOhs.
Method InstrumentsDictionary.getProgramChange() outputs its string matching results to the command line or log file, resp.
Missing accid.ges attribute processing in Helper.computePitch() added.

v0.1.1

Renamed the dur attribute in MSM notes and rests into midi.duration.
Further renamings: date into midi.date, pitch into midi.pitch, channel.midi into midi.channel, and port.midi into midi.port.
Added Bassus, Cantus, Singstimme, Singstimmen, Pianoforte, Trumpet in, Trompete in to the instruments dictionary.
Added a flag to the window mode constructor method MeicoApp(String title, boolean makeLogFile). The redirection of console output into a log file is done only when makeLogFile is set true.
Bugfixing in Mei.processStaff() and Helper.getPart().
tie elements are now processed (new method Mei.resolveTieElements()); they are resolved into tie attributes of note elements during the preprocessing. Hence, meico now supports the use of tieelements and is no longer restricted to tie attributes only. However, users should not mix tie and slur elements; the latter are not and will not be processed as ties!
Method Mei.resolveCopyOfs() rewritten. It is not only faster now. It might happen (and does happen in the MEI sample library) that a placeholder element (the one with the copyof attribute) copies elements that again contain placeholders; it requires multiple runs to resolve this. The new implementation can handle circular referencing (cannot be resolved and would otherwise lead to infinite loops). Furthermore, if the placeholder element has an xml:id this id is no longer overwritten by the newly generated ids.
Method Mei.reorderElements() (part of the MEI preprocessing) has been rewritter and is much faster now.

v0.1.0 (beta release)

Moved unused code in the meico.midi package into the legacy sub-package.
Added validation of MEI files against mei-CMN.rng version 3.0.0 (August 2016).
- The file mei-CMN.rng from MEI GitHub repository was added to the resources.
- The Jing library (version 20091111) was added to the externals (notice the copyright.txt in file jing-20091111.jar).
- The method validateAgainstSchema() is implemented in class Helper and called by validate() through readMeiFile() in class Mei.
- New addition to command line mode: [-v] or [--validate]: to activate validation of mei files loaded.
- In window mode files are read without validation by default. Right click on the MEI file loaded to trigger validation and get a popup message on the success.
- Applications may call method isValid() in class Mei after the file was read to check validity. If the file has been loaded without validation it remains false by default. To do the validation afterwards, call validate().
In window mode all command line outputs (System.out and System.err) are now redirected into a log file meico.log.
Added Bratsche to the instruments dictionary.
Replaced the : in the id generation for copyOf resolution into _.

v0.0.7

Added flag to the mei-to-msm conversion to avoid the midi drum channel, added it to the window mode and command line options
- [-c] or [--dont-use-channel-10]: the flag says whether channel 10 (midi drum channel) shall be used or not; it is already done at mei-to-msm convertion, because the msm should align with the midi file later on
Changed id generation for copyOf resolution into a combined id: source id + ":" + generated id; hence, applications can now trace them back to the source element
Minor bugfix of command line option [--no--program-changes] to [--no-program-changes]
Minor ui corrections for window mode
Adding new attributes, date.midi and dur.midi, to mei note and rest elements during conversion. This is only for debugging purpose and appears only in the -debug.mei file when running the command line mode with --debug flag.
Also a pnum is added to the mei note elements in the debug version which holds the calculated midi pitch value.

v0.0.6

Added Canto, Quinto and Tenore to the VoiceOhs in the instruments dictionary.
In MeicoApp's commandLineMode() a relative path can be used; the absolute path is derived automatically. Hence, users do not have to write down whole paths in the command line from now on.
Fixed bug in the processing of note accidentals when accid elements are used instead of accid attributes.
Fixed bug in Helper.getNextSiblingElement(Element ofThis).
Method exportMidi() in Msm.java now has a flag to suppress the generation of program change events (useful in some applications). The flag is also supported in command line mode (add [--no-program-changes] to your call) and window mode (right click on the msm to midi conversion button).
Added an optional tempo parameter to the command line mode [-t argument] or [--tempo argument].
Changed the format of the command line parameters to follow POSIX standard.
- [-?] or [--help]: for this command line help text. If you use this, any other arguments are skipped.
- [-a] or [--add-ids]: to add xml:ids to note, rest and chord elements in mei, as far as they do not have an id; meico will output a revised mei file
- [-r] or [--resolve-copy-ofs]: mei elements with a copyOf attribute are resolved into selfcontained elements with an own xml:id; meico will output a revised mei file
- [-m] or [--msm]: converts mei to msm; meico will write an msm file to the path of the mei
- [-i] or [--midi]: converts mei to msm to midi; meico will output a midi file to the path of the mei
- [-p] or [--no-program-changes]: call this to suppress the generation of program change events in midi
- [-t argument] or [--tempo argument]: this sets the tempo of the midi file; the argument must be a floating point number; if this is not used the tempo is always 120 bpm
- [-d] or [--debug]: to write debug versions of mei and msm
- Path tho the mei file (e.g., "D:\Arbeit\Software\Java\MEI Converter\test files\Hummel_Concerto_for_trumpet.mei"), this should always be the last parameter - always in quotes!

v0.0.5

Bugs fixed in Mei.java that were introduced by rewriting convert() for Java 1.6 compatibility.

v0.0.4

Java 1.6+ compatibility instrument dictionary extended (church organ: upper, lower, pedal)

v0.0.3

So far, msm part names were the staffDef labels. Now, they are created from an eventually existing parent staffGrp label and the staffDef label ("staffGrp label" + " " + "staffDef label").

v0.0.2

Java 7+ compatibility

v0.0.1

first release (requires Java 8+)

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