Hey ST Community,
I'm currently trying out the CCA02M2 MEMS microphone board on a NUCLEO-L476RG, using firmware compiled from X-CUBE-MEMSMIC1.
The microphones work, but the signal seems to have some heavy filtering. For example:
If I record with Audacity and snap/tap near the mic, I don’t see any response.
If I play a frequency sweep from my laptop, it only gets recorded when I’m also speaking, but not if the sweep is played alone.
This makes me think there’s a strong filter or noise suppression enabled by default.
Where in the firmware should I look to disable these filters? Is it controlled by the PDM2PCM library, or another stage in the middleware?
Thanks in advance for any guidance!
