Crosspost as I maybe posted in the wrong place, here the original text:
There seems to be an automatic noise reduction or filter that removes some of the audio but introduces very ugly audio artefacts. This affects videos but also voice messages. When I do not want this processing applied for videos I can use OpenCamera and select “unprocessed” for audio (automatic audio ducking in videos but for example with audio messages using a chat app (Signal, Threema) there is no such option and I’m left with this processing and the ugly artefacts in the recording. Is there an option I am missing or some workaround?