9.2.8. amixer -c Headset contents output

numid=7,iface=CARD,name='Keep Interface'
  ; type=BOOLEAN,access=rw------,values=1
  : values=off
numid=5,iface=MIXER,name='PCM Playback Switch'
  ; type=BOOLEAN,access=rw------,values=1
  : values=on
numid=6,iface=MIXER,name='PCM Playback Volume'
  ; type=INTEGER,access=rw---R--,values=1,min=0,max=64,step=0
  : values=64
  | dBminmax-min=-64.00dB,max=0.00dB
numid=3,iface=MIXER,name='Mic Capture Switch'
  ; type=BOOLEAN,access=rw------,values=1
  : values=on
numid=4,iface=MIXER,name='Mic Capture Volume'
  ; type=INTEGER,access=rw---R--,values=1,min=0,max=3,step=0
  : values=0
  | dBminmax-min=0.00dB,max=3.00dB
numid=1,iface=PCM,name='Capture Channel Map'
  ; type=INTEGER,access=r----R--,values=1,min=0,max=36,step=0
  : values=0
  | container
    | chmap-fixed=MONO

numid=2,iface=PCM,name='Playback Channel Map'
  ; type=INTEGER,access=r----R--,values=1,min=0,max=36,step=0
  : values=0
  | container
    | chmap-fixed=MONO
    | chmap-fixed=FL,FR