I want to use headset mic on android and relay that to PC. Currently it only relays the android mic to PC.
In the Android app’s server settings, if Voice communication is selected as a Microphone mode, could you try to change it to Default?
Audio Relay did relay to the headset mic at one time, and he put a button in there to switch it, but it’s android’s policy that changed. If you plug in headphones, google will will send their notifications to “allow google to be your assistant.” This is assumming you don’t already allow google to be your assistant. If you do though, you will probably not see this, and I’d be surprised if they notified anybody but devs.