arecord -L
null
    Discard all samples (playback) or generate zero samples (capture)
default:CARD=Intel
    HDA Intel, ALC889A Analog
    Default Audio Device
sysdefault:CARD=Intel
    HDA Intel, ALC889A Analog
    Default Audio Device
front:CARD=Intel,DEV=0
    HDA Intel, ALC889A Analog
    Front speakers
surround40:CARD=Intel,DEV=0
    HDA Intel, ALC889A Analog
    4.0 Surround output to Front and Rear speakers
surround41:CARD=Intel,DEV=0
    HDA Intel, ALC889A Analog
    4.1 Surround output to Front, Rear and Subwoofer speakers
surround50:CARD=Intel,DEV=0
    HDA Intel, ALC889A Analog
    5.0 Surround output to Front, Center and Rear speakers
surround51:CARD=Intel,DEV=0
    HDA Intel, ALC889A Analog
    5.1 Surround output to Front, Center, Rear and Subwoofer speakers
surround71:CARD=Intel,DEV=0
    HDA Intel, ALC889A Analog
    7.1 Surround output to Front, Center, Side, Rear and Woofer speakers
iec958:CARD=Intel,DEV=0
    HDA Intel, ALC889A Digital
    IEC958 (S/PDIF) Digital Audio Output