Hi there!
Whenever I record a video the mic audio is very low. I thought it was the internal microphone so bought a Sennheiser USB-C microphone but the problem persists.
I tried a Microphone amplifier app and it was able to record louder sound, unfortunately I can only record this sound in the amplifier app which is no good for when I am recording videos.
So my guess is there is some setting inside android or the fairphone that is purposely limiting the volume of the mic.
I’d love to be able to use my fairphone to record videos but at the moment I can’t due to the sound being so muted.