VAR-SOM-AM33 Audio record play
From Variscite Wiki
Audio record/play
$ aplay /usr/share/sounds/alsa/Front_Center.wav $ amixer sset 'Left Line1L Mux' differential $ amixer sset 'Right Line1R Mux' differential $ arecord -f dat -d 10 -D hw:0,0 -N test.wav $ aplay test.wav