| # Check SampleRates supported by USB Sound Card lsusb lsusb -v -d 1b3f:2007 | grep tSamFreq # See various config file content cat /proc/asound/cards cat /proc/asound/modules cat ~/.asoundrc cat /etc/asound.conf # Start AlsaMixer for channel 0 alsamixer -c 0 # Start AlsaMixer for channel 1 alsamixer -c 1 # Change the default HDMI sound ouput for the 3.5mm jack output amixer –c 0 cset numid=3 1 # Check mixer settings amixer -c 0 amixer -c 1 # List PLAYBACK Hardware Devices by Name aplay -L # List CAPTURE Hardware Devices by Name arecord -L # List of CAPTURE Hardware Devices arecord -l # List of PLAYBACK Hardware Devices aplay -l |