Setting for microphone volume

Thank you for the good work! I made Nextcloud Talk my standard video conferencing platform.

When using Nextcloud Talk on a Samsung Galaxy S5 with LineageOS, the recorded audio is barely audible on the other side. I also observed that Linphone has the same problems with the internal microphone and even what the in-built audio recorder produces needs about 5-10 times amplification to be heard clearly.

While this might be another difficult-if-not-impossible-to-solve LineageOS problem, I wondered if you could just add an option in the settings to configure the microphone level, similar to Linphone. That would be so helpful! A simple slider going from 100% (default) to say 1000% would already be enough! Since on Android you can only configure output levels, so each app needs to offer this functionality by itself...

Start by locating the microphone capture path and the settings entry points in the Android app. Determine where a configurable microphone gain could be applied and how the setting should persist. Done means a settings control can increase microphone volume during calls without breaking normal recording; verify with a call or recording on the reported device.