1. enable the Mic in alsamixer. run “alsamixer” in terminal, Press “F5″ , find the Mic, then press “space” to enable the Mic input.
alsamixer taken by Camera
taken by fbgrab
2. by default alsa-util not install the “arecord”. it’s a link of aplay. so we just create that link
#cd /usr/bin
#ln -s ./aplay ./arecord
3. run “record record.wav” to record some sound. 
cool!
Thanks! This way is easier than doing it with alsactl. I still can’t run sndpeek, I’ll have to keep tinkering with it.
Ruben
Hi! Thanks alot for this solution. Btw, how do you improve the sound quality when recording? It’s recording in 8-bit mono at 8000 Hz.