Hello, I wonder how to gain the microphone stream

[Deadpoolmine]

No description provided.

[NateRickard]

You mean adjust the gain on the mic input?

This would likely be specific to the OS and not a shared feature of this library. E.g. on iOS you may be able to do something with configuring the audio session to achieve a different mic gain. There is an OnPrepareAudioSession event fired prior to recording that you may be able to leverage.

See this sample for example usage (however, note that this example is on the audio player vs the recorder - same concept applies).