desktop:~$ aplay -L
default
    Playback/recording through the PulseAudio sound server
pulse
    Playback/recording through the PulseAudio sound server
front:CARD=DX,DEV=0
    Xonar DX, Multichannel
    Front speakers
surround40:CARD=DX,DEV=0
    Xonar DX, Multichannel
    4.0 Surround output to Front and Rear speakers
surround41:CARD=DX,DEV=0
    Xonar DX, Multichannel
    4.1 Surround output to Front, Rear and Subwoofer speakers
surround50:CARD=DX,DEV=0
    Xonar DX, Multichannel
    5.0 Surround output to Front, Center and Rear speakers
surround51:CARD=DX,DEV=0
    Xonar DX, Multichannel
    5.1 Surround output to Front, Center, Rear and Subwoofer speakers
surround71:CARD=DX,DEV=0
    Xonar DX, Multichannel
    7.1 Surround output to Front, Center, Side, Rear and Woofer speakers
iec958:CARD=DX,DEV=0
    Xonar DX, Multichannel
    IEC958 (S/PDIF) Digital Audio Output
dmix:CARD=DX,DEV=0
    Xonar DX, Multichannel
    Direct sample mixing device
dmix:CARD=DX,DEV=1
    Xonar DX, Digital
    Direct sample mixing device
dsnoop:CARD=DX,DEV=0
    Xonar DX, Multichannel
    Direct sample snooping device
dsnoop:CARD=DX,DEV=1
    Xonar DX, Digital
    Direct sample snooping device
hw:CARD=DX,DEV=0
    Xonar DX, Multichannel
    Direct hardware device without any conversions
hw:CARD=DX,DEV=1
    Xonar DX, Digital
    Direct hardware device without any conversions
plughw:CARD=DX,DEV=0
    Xonar DX, Multichannel
    Hardware device with all software conversions
plughw:CARD=DX,DEV=1
    Xonar DX, Digital
    Hardware device with all software conversions
front:CARD=Intel,DEV=0
    HDA Intel, ALC662 rev1 Analog
    Front speakers
surround40:CARD=Intel,DEV=0
    HDA Intel, ALC662 rev1 Analog
    4.0 Surround output to Front and Rear speakers
surround41:CARD=Intel,DEV=0
    HDA Intel, ALC662 rev1 Analog
    4.1 Surround output to Front, Rear and Subwoofer speakers
surround50:CARD=Intel,DEV=0
    HDA Intel, ALC662 rev1 Analog
    5.0 Surround output to Front, Center and Rear speakers
surround51:CARD=Intel,DEV=0
    HDA Intel, ALC662 rev1 Analog
    5.1 Surround output to Front, Center, Rear and Subwoofer speakers
surround71:CARD=Intel,DEV=0
    HDA Intel, ALC662 rev1 Analog
    7.1 Surround output to Front, Center, Side, Rear and Woofer speakers
iec958:CARD=Intel,DEV=0
    HDA Intel, ALC662 rev1 Digital
    IEC958 (S/PDIF) Digital Audio Output
dmix:CARD=Intel,DEV=0
    HDA Intel, ALC662 rev1 Analog
    Direct sample mixing device
dmix:CARD=Intel,DEV=1
    HDA Intel, ALC662 rev1 Digital
    Direct sample mixing device
dsnoop:CARD=Intel,DEV=0
    HDA Intel, ALC662 rev1 Analog
    Direct sample snooping device
dsnoop:CARD=Intel,DEV=1
    HDA Intel, ALC662 rev1 Digital
    Direct sample snooping device
hw:CARD=Intel,DEV=0
    HDA Intel, ALC662 rev1 Analog
    Direct hardware device without any conversions
hw:CARD=Intel,DEV=1
    HDA Intel, ALC662 rev1 Digital
    Direct hardware device without any conversions
plughw:CARD=Intel,DEV=0
    HDA Intel, ALC662 rev1 Analog
    Hardware device with all software conversions
plughw:CARD=Intel,DEV=1
    HDA Intel, ALC662 rev1 Digital
    Hardware device with all software conversions