I’ve started to use our Creator board as a microphone array via the HAL, but based on the output of micarray_recorder I’m a bit concerned about the quality of the audio.
It would seem the sensitivity is particularly low, with even a relatively loud source less than 1m away only registering at -30db, and all the microphones having some amount of DC offset (with each microphone having a differing amount, either positive or negative).
I can see there is a gain value, but it seems this is just for the beamformed channel on channel 8.
Is there any steps to increase the sensitivity of the microphones?
Also, I see reference to a 48khz recording option becoming available. Is there any details for that as it is important for intended use.