$ aplay -L
default
    Playback/recording through the PulseAudio sound server
sysdefault:CARD=Intel
    HDA Intel, AD1884 Analog
    Default Audio Device
front:CARD=Intel,DEV=0
    HDA Intel, AD1884 Analog
    Front speakers
surround40:CARD=Intel,DEV=0
    HDA Intel, AD1884 Analog
    4.0 Surround output to Front and Rear speakers
surround41:CARD=Intel,DEV=0
    HDA Intel, AD1884 Analog
    4.1 Surround output to Front, Rear and Subwoofer speakers
surround50:CARD=Intel,DEV=0
    HDA Intel, AD1884 Analog
    5.0 Surround output to Front, Center and Rear speakers
surround51:CARD=Intel,DEV=0
    HDA Intel, AD1884 Analog
    5.1 Surround output to Front, Center, Rear and Subwoofer speakers
surround71:CARD=Intel,DEV=0
    HDA Intel, AD1884 Analog
    7.1 Surround output to Front, Center, Side, Rear and Woofer speakers
dmix:CARD=Intel,DEV=0
    HDA Intel, AD1884 Analog
    Direct sample mixing device
dmix:CARD=Intel,DEV=2
    HDA Intel, AD1884 Alt Analog
    Direct sample mixing device
dsnoop:CARD=Intel,DEV=0
    HDA Intel, AD1884 Analog
    Direct sample snooping device
dsnoop:CARD=Intel,DEV=2
    HDA Intel, AD1884 Alt Analog
    Direct sample snooping device
hw:CARD=Intel,DEV=0
    HDA Intel, AD1884 Analog
    Direct hardware device without any conversions
hw:CARD=Intel,DEV=2
    HDA Intel, AD1884 Alt Analog
    Direct hardware device without any conversions
plughw:CARD=Intel,DEV=0
    HDA Intel, AD1884 Analog
    Hardware device with all software conversions
plughw:CARD=Intel,DEV=2
    HDA Intel, AD1884 Alt Analog
    Hardware device with all software conversions
hdmi:CARD=NVidia,DEV=0
    HDA NVidia, HDMI 0
    HDMI Audio Output
hdmi:CARD=NVidia,DEV=1
    HDA NVidia, HDMI 1
    HDMI Audio Output
dmix:CARD=NVidia,DEV=3
    HDA NVidia, HDMI 0
    Direct sample mixing device
dmix:CARD=NVidia,DEV=7
    HDA NVidia, HDMI 1
    Direct sample mixing device
dsnoop:CARD=NVidia,DEV=3
    HDA NVidia, HDMI 0
    Direct sample snooping device
dsnoop:CARD=NVidia,DEV=7
    HDA NVidia, HDMI 1
    Direct sample snooping device
hw:CARD=NVidia,DEV=3
    HDA NVidia, HDMI 0
    Direct hardware device without any conversions
hw:CARD=NVidia,DEV=7
    HDA NVidia, HDMI 1
    Direct hardware device without any conversions
plughw:CARD=NVidia,DEV=3
    HDA NVidia, HDMI 0
    Hardware device with all software conversions
plughw:CARD=NVidia,DEV=7
    HDA NVidia, HDMI 1
    Hardware device with all software conversions