Interface 2: Alt=0 nEP=0 Class=1(Audio) SubClass=1 Protocol=0 StringIx=0
Interface 3: Alt=0 nEP=0 Class=1(Audio) SubClass=2 Protocol=0 StringIx=0
Interface 3: Alt=1 nEP=1 Class=1(Audio) SubClass=2 Protocol=0 StringIx=0
Interface 3: Alt=2 nEP=1 Class=1(Audio) SubClass=2 Protocol=0 StringIx=0
Interface 3: Alt=3 nEP=1 Class=1(Audio) SubClass=2 Protocol=0 StringIx=0
Interface 3: Alt=4 nEP=1 Class=1(Audio) SubClass=2 Protocol=0 StringIx=0
The information on audio is rather meager i.e. even endpoint information is missing.
Fortunately I have lsusb reports from both c250 and c270 webcams and the audio descriptors appear to be identical.
The inbuild microphone may deliver 16-bit mono at 16000/ 24000/32000/48000 Hz.
I have experimented in the past to obtain audio from the c250 webcam and it appears to be possible.
The big question is what to do with the audio data once obtained. Should it go to the default audio device?
The truth is that I am not really an application programmer, so I want this to be as simple as it can be.
I also tried to have usbaudio.sys recognize the c250 microphone but I gave up on that.