How to stream mic data between flutter and platform?

I been trying to figure out how to stream mic data from the android to flutter. I found some example code on how to query mic in chucks but I do not know a way to get the data onto flutter.

https://github.com/bitplane/Microphone/blob/master/src/net/bitplane/android/microphone/MicrophoneService.java

I am not sure which classes to look in flutter

https://docs.flutter.io/flutter/services/EventChannel/receiveBroadcastStream.html

I wonder if anyone can help me point to the right direction.