has a very effective filter for noise removal
Supports import/export of AC3, M4A/M4R & with the optional FFmpeg library
Is free, gratis & open source
Is available for Windows/Mac/Linux
Can do a lot more.
I recommend ShareX
It is free and open source.
To setting it up, go to Task Setting > Capture Screen Recorder > Screen recording options, select video source and audio source.
By default it is using your microphone, but if you want to record internal sound, you can click install recorder devices. This will install virtual audio capturer, so it will record ...
I have a smartphone from BQ with the BQ camera app version 4.12.5, which also seems to be available for everyone. I just tested it and there is definitely sound (distorted) while playing back a slow motion video.
The app mentions that it is based on the Camera2 API from Google. Maybe other apps also being based on that API offer the same functionality.