---

user@ALT-1e1f46 ~]$ amixer -c 1 cset numid=29 1
numid=29,iface=MIXER,name='Speaker Switch'
  ; type=BOOLEAN,access=rw------,values=1
  : values=on
[user@ALT-1e1f46 ~]$ amixer -c 1 contents | grep -A6 -B1 -E "Speaker|Headphone Mixer|Left Headphone|Right Headphone"
  : values=on
numid=2,iface=MIXER,name='Headphone Mixer Volume'
  ; type=INTEGER,access=rw---R--,values=2,min=0,max=11,step=0
  : values=2,2
  | dBrange-
    rangemin=0,,rangemax=4
      | dBscale-min=-12.00dB,step=1.50dB,mute=0
    rangemin=8,,rangemax=11
--
  : values=off
numid=64,iface=MIXER,name='Left Headphone Mixer LLIN Switch'
  ; type=BOOLEAN,access=rw------,values=1
  : values=off
numid=65,iface=MIXER,name='Left Headphone Mixer Left DAC Switch'
  ; type=BOOLEAN,access=rw------,values=1
  : values=on
numid=62,iface=MIXER,name='Left Headphone Mux'
  ; type=ENUMERATED,access=rw------,values=1,items=4
  ; Item #0 'lin1-rin1'
  ; Item #1 'lin2-rin2'
  ; Item #2 'lin-rin with Boost'
  ; Item #3 'lin-rin with Boost and PGA'
  : values=0
--
  | dBscale-min=-64.00dB,step=2.00dB,mute=1
numid=66,iface=MIXER,name='Right Headphone Mixer RLIN Switch'
  ; type=BOOLEAN,access=rw------,values=1
  : values=off
numid=67,iface=MIXER,name='Right Headphone Mixer Right DAC Switch'
  ; type=BOOLEAN,access=rw------,values=1
  : values=on
numid=63,iface=MIXER,name='Right Headphone Mux'
  ; type=ENUMERATED,access=rw------,values=1,items=4
  ; Item #0 'lin1-rin1'
  ; Item #1 'lin2-rin2'
  ; Item #2 'lin-rin with Boost'
  ; Item #3 'lin-rin with Boost and PGA'
  : values=0
numid=29,iface=MIXER,name='Speaker Switch'
  ; type=BOOLEAN,access=rw------,values=1
  : values=on
numid=38,iface=PCM,name='ELD',device=5
  ; type=BYTES,access=r--v----,values=0
  : values=
numid=51,iface=PCM,name='Playback Channel Map',device=5