I opened mobilertc.aar using AndroidStudio and found the AudioDeviceAndroid.class file.
In this file, there are three pieces of code where an instance of AudioRecord is created.
Unfortunately, when it comes to logic internal to the SDK, we cannot disclose much information as some of it may be proprietary in nature. If you have any questions related to the publicly available SDK methods, please let me know and I will be more than happy to help.
There isn’t a lot of control offered through the SDK for audio input, unfortunately.
There is a small amount of control allowed for output through the InMeetingAudioController class.
Please let me know if you have any questions on how to use this, or if there is anything missing that you would like us to consider adding in a future release.