Setting up mic for recording

[hystrix1]

The sound card seems to default to Line In for recording. This can easily be changed to use the on-board mics by using the following commands:

amixer cset name='ADC Mux' 0
amixer cset name='PGA Volume' 44

...and record using:

arecord -r 192000 -f S16_LE -c 2 -d 5 /tmp/test.wav

A nice ultrasound spectrogram can be found in my post on the audio injector forum:
http://forum.audioinjector.net/viewtopic.php?f=11&t=5678#p8339

Nice sound card :-)

[flyDlight]

Thanks for this informations.
I'm trying to build a bat detector, but I can not find an instruction manual for the sound card. Where did you find this commands?

[flyDlight]

I answer myself. I asked a stupid question. They are the standard ALSA commands, which I did not know.

[flatmax]

Yes, that is right !