问题
We are trying to adjust the volume level at which we record. It seems like the microphone is very sensitive and picks up a lot of static.
We looked at setVolumeControlStream, but could not find a stream to pass into it to control the microphone.
回答1:
Set your audio source as 'MIC' using MediaRecorder.AudioSource class and adjust volume by calling onVolumeSetRequest method.
来源：https://stackoverflow.com/questions/5994683/adjust-microphone-recording-volume