cat /proc/asound/devices
  0: [ 0]   : control
  1:        : sequencer
  4: [ 0- 0]: hardware dependent
  5: [ 0- 1]: hardware dependent
  6: [ 0- 2]: hardware dependent
 16: [ 0- 0]: digital audio playback
 17: [ 0- 1]: digital audio playback
 20: [ 0- 4]: digital audio playback
 24: [ 0- 0]: digital audio capture
 26: [ 0- 2]: digital audio capture
 28: [ 0- 4]: digital audio capture
 33:        : timer


aplay -L
default:CARD=Intel
    HDA Intel, ALC883 Analog
    Default Audio Device
front:CARD=Intel,DEV=0
    HDA Intel, ALC883 Analog
    Front speakers
surround40:CARD=Intel,DEV=0
    HDA Intel, ALC883 Analog
    4.0 Surround output to Front and Rear speakers
surround41:CARD=Intel,DEV=0
    HDA Intel, ALC883 Analog
    4.1 Surround output to Front, Rear and Subwoofer speakers
surround50:CARD=Intel,DEV=0
    HDA Intel, ALC883 Analog
    5.0 Surround output to Front, Center and Rear speakers
surround51:CARD=Intel,DEV=0
    HDA Intel, ALC883 Analog
    5.1 Surround output to Front, Center, Rear and Subwoofer speakers
surround71:CARD=Intel,DEV=0
    HDA Intel, ALC883 Analog
    7.1 Surround output to Front, Center, Side, Rear and Woofer speakers
null
    Discard all samples (playback) or generate zero samples (capture)

-- 
Intel 82801H sound card speakers not working
https://bugs.launchpad.net/bugs/210865
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