aplay

null
    Discard all samples (playback) or generate zero samples (capture)
front:CARD=NVidia,DEV=0
    HDA NVidia, VT1708S Analog
    Front speakers
surround40:CARD=NVidia,DEV=0
    HDA NVidia, VT1708S Analog
    4.0 Surround output to Front and Rear speakers
surround41:CARD=NVidia,DEV=0
    HDA NVidia, VT1708S Analog
    4.1 Surround output to Front, Rear and Subwoofer speakers
surround50:CARD=NVidia,DEV=0
    HDA NVidia, VT1708S Analog
    5.0 Surround output to Front, Center and Rear speakers
surround51:CARD=NVidia,DEV=0
    HDA NVidia, VT1708S Analog
    5.1 Surround output to Front, Center, Rear and Subwoofer speakers
surround71:CARD=NVidia,DEV=0
    HDA NVidia, VT1708S Analog
    7.1 Surround output to Front, Center, Side, Rear and Woofer speakers
dmix:CARD=NVidia,DEV=0
    HDA NVidia, VT1708S Analog
    Direct sample mixing device
dsnoop:CARD=NVidia,DEV=0
    HDA NVidia, VT1708S Analog
    Direct sample snooping device
hw:CARD=NVidia,DEV=0
    HDA NVidia, VT1708S Analog
    Direct hardware device without any conversions
plughw:CARD=NVidia,DEV=0
    HDA NVidia, VT1708S Analog
    Hardware device with all software conversions
hdmi:CARD=NVidia_1,DEV=0
    HDA NVidia, HDMI 0
    HDMI Audio Output
dmix:CARD=NVidia_1,DEV=3
    HDA NVidia, HDMI 0
    Direct sample mixing device
dsnoop:CARD=NVidia_1,DEV=3
    HDA NVidia, HDMI 0
    Direct sample snooping device
hw:CARD=NVidia_1,DEV=3
    HDA NVidia, HDMI 0
    Direct hardware device without any conversions
plughw:CARD=NVidia_1,DEV=3
    HDA NVidia, HDMI 0
    Hardware device with all software conversions