Setting for microphone volume

[jojosoft]

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...

[ASerbinski]

Does it use WebRTC? If so, it would probably be a good idea just to enable Automatic Gain Control (AGC).