-----------------------------------------------------------------
Команды просмотра настроек 
-----------------------------------------------------------------
$ amixer controls
$ amixer contents | less
$ amixer contents | less | grep Headphone



-----------------------------------------------------------------
Выставить уровень PCM Playback Volume
[см. вывод 'amixer contents']
-----------------------------------------------------------------
$ amixer cset numid=48,iface=MIXER,name='PCM Playback Volume' 100,100
numid=48,iface=MIXER,name='PCM Playback Volume'
  ; type=INTEGER,access=rw---RW-,values=2,min=0,max=255,step=0
  : values=100,100
  | dBscale-min=-51.00dB,step=0.20dB,mute=0



-----------------------------------------------------------------
Команды управления включением/выключением звука
Headphone - HD Audio Front Panel системного блока
[см. вывод 'amixer contents']
-----------------------------------------------------------------
Включить Headphone Playback - HD Audio Front Panel:
$ amixer cset numid=11,iface=MIXER,name='Headphone Playback Switch' on,on
numid=11,iface=MIXER,name='Headphone Playback Switch'
  ; type=BOOLEAN,access=rw------,values=2
  : values=on,on


Выключить Headphone Playback - HD Audio Front Panel:
$ amixer cset numid=11,iface=MIXER,name='Headphone Playback Switch' off,off
numid=11,iface=MIXER,name='Headphone Playback Switch'
  ; type=BOOLEAN,access=rw------,values=2
  : values=off,off



-----------------------------------------------------------------
$ lspci -vv | less
-----------------------------------------------------------------
00:1b.0 Audio device: Intel Corporation 82801H (ICH8 Family) HD Audio Controller (rev 02)
        Subsystem: ASUSTeK Computer Inc. P5B
        Control: I/O- Mem+ BusMaster+ SpecCycle- MemWINV- VGASnoop- ParErr- Stepping- SERR- FastB2B- DisINTx-
        Status: Cap+ 66MHz- UDF- FastB2B- ParErr- DEVSEL=fast >TAbort- <TAbort- <MAbort- >SERR- <PERR- INTx-
        Latency: 0, Cache Line Size: 32 bytes
        Interrupt: pin A routed to IRQ 22
        Region 0: Memory at febf8000 (64-bit, non-prefetchable) [size=16K]
        Capabilities: <access denied>
        Kernel driver in use: HDA Intel



-----------------------------------------------------------------
Информация о mixer устройстве:
$ amixer info
-----------------------------------------------------------------
Card default 'Intel'/'HDA Intel at 0xfebf8000 irq 22'
  Mixer name	: 'Analog Devices AD1988'
  Components	: 'HDA:11d41988,104381e1,00100400'
  Controls      : 48
  Simple ctrls  : 26



-----------------------------------------------------------------
Полный список управляющих настроек карты
$ amixer controls
-----------------------------------------------------------------
numid=47,iface=MIXER,name='Master Playback Switch'
numid=46,iface=MIXER,name='Master Playback Volume'
numid=11,iface=MIXER,name='Headphone Playback Switch'
numid=48,iface=MIXER,name='PCM Playback Volume'
numid=23,iface=MIXER,name='Front Mic Boost'
numid=16,iface=MIXER,name='Front Mic Playback Switch'
numid=15,iface=MIXER,name='Front Mic Playback Volume'
numid=6,iface=MIXER,name='Front Playback Switch'
numid=1,iface=MIXER,name='Front Playback Volume'
numid=7,iface=MIXER,name='Surround Playback Switch'
numid=2,iface=MIXER,name='Surround Playback Volume'
numid=8,iface=MIXER,name='Center Playback Switch'
numid=3,iface=MIXER,name='Center Playback Volume'
numid=9,iface=MIXER,name='LFE Playback Switch'
numid=4,iface=MIXER,name='LFE Playback Volume'
numid=18,iface=MIXER,name='Line Playback Switch'
numid=17,iface=MIXER,name='Line Playback Volume'
numid=14,iface=MIXER,name='CD Playback Switch'
numid=13,iface=MIXER,name='CD Playback Volume'
numid=24,iface=MIXER,name='Mic Boost'
numid=20,iface=MIXER,name='Mic Playback Switch'
numid=19,iface=MIXER,name='Mic Playback Volume'
numid=12,iface=MIXER,name='Mono Playback Switch'
numid=26,iface=MIXER,name='Capture Switch'
numid=28,iface=MIXER,name='Capture Switch',index=1
numid=30,iface=MIXER,name='Capture Switch',index=2
numid=25,iface=MIXER,name='Capture Volume'
numid=27,iface=MIXER,name='Capture Volume',index=1
numid=29,iface=MIXER,name='Capture Volume',index=2
numid=41,iface=MIXER,name='IEC958 Default PCM Playback Switch'
numid=37,iface=MIXER,name='IEC958 Playback Con Mask'
numid=38,iface=MIXER,name='IEC958 Playback Pro Mask'
numid=39,iface=MIXER,name='IEC958 Playback Default'
numid=35,iface=MIXER,name='IEC958 Playback Source'
numid=40,iface=MIXER,name='IEC958 Playback Switch'
numid=34,iface=MIXER,name='IEC958 Playback Volume'
numid=43,iface=MIXER,name='IEC958 Capture Default'
numid=42,iface=MIXER,name='IEC958 Capture Switch'
numid=36,iface=MIXER,name='IEC958 Capture Volume'
numid=22,iface=MIXER,name='Analog Mix Playback Switch'
numid=21,iface=MIXER,name='Analog Mix Playback Volume'
numid=45,iface=MIXER,name='Beep Playback Switch'
numid=44,iface=MIXER,name='Beep Playback Volume'
numid=31,iface=MIXER,name='Input Source'
numid=32,iface=MIXER,name='Input Source',index=1
numid=33,iface=MIXER,name='Input Source',index=2
numid=10,iface=MIXER,name='Side Playback Switch'
numid=5,iface=MIXER,name='Side Playback Volume'



-----------------------------------------------------------------
Полный список управляющих настроек карты с состоянием настроек
$ amixer contents | less
-----------------------------------------------------------------
numid=47,iface=MIXER,name='Master Playback Switch'
  ; type=BOOLEAN,access=rw------,values=1
  : values=on
numid=46,iface=MIXER,name='Master Playback Volume'
  ; type=INTEGER,access=rw---R--,values=1,min=0,max=39,step=0
  : values=26
  | dBscale-min=-58.50dB,step=1.50dB,mute=0
numid=11,iface=MIXER,name='Headphone Playback Switch'
  ; type=BOOLEAN,access=rw------,values=2
  : values=on,on
numid=48,iface=MIXER,name='PCM Playback Volume'
  ; type=INTEGER,access=rw---RW-,values=2,min=0,max=255,step=0
  : values=248,248
  | dBscale-min=-51.00dB,step=0.20dB,mute=0
numid=23,iface=MIXER,name='Front Mic Boost'
  ; type=INTEGER,access=rw---R--,values=2,min=0,max=3,step=0
  : values=0,0
  | dBscale-min=0.00dB,step=10.00dB,mute=0
numid=16,iface=MIXER,name='Front Mic Playback Switch'
  ; type=BOOLEAN,access=rw------,values=2
  : values=on,on
numid=15,iface=MIXER,name='Front Mic Playback Volume'
  ; type=INTEGER,access=rw---R--,values=2,min=0,max=31,step=0
  : values=0,0
  | dBscale-min=-34.50dB,step=1.50dB,mute=0
numid=6,iface=MIXER,name='Front Playback Switch'
  ; type=BOOLEAN,access=rw------,values=2
  : values=on,on
numid=1,iface=MIXER,name='Front Playback Volume'
  ; type=INTEGER,access=rw---R--,values=2,min=0,max=39,step=0
  : values=38,38
  | dBscale-min=-58.50dB,step=1.50dB,mute=0
numid=7,iface=MIXER,name='Surround Playback Switch'
  ; type=BOOLEAN,access=rw------,values=2
  : values=off,off
numid=2,iface=MIXER,name='Surround Playback Volume'
  ; type=INTEGER,access=rw---R--,values=2,min=0,max=39,step=0
  : values=0,0
  | dBscale-min=-58.50dB,step=1.50dB,mute=0
numid=8,iface=MIXER,name='Center Playback Switch'
  ; type=BOOLEAN,access=rw------,values=1
  : values=off
numid=3,iface=MIXER,name='Center Playback Volume'
  ; type=INTEGER,access=rw---R--,values=1,min=0,max=39,step=0
  : values=0
  | dBscale-min=-58.50dB,step=1.50dB,mute=0
numid=9,iface=MIXER,name='LFE Playback Switch'
  ; type=BOOLEAN,access=rw------,values=1
  : values=off
numid=4,iface=MIXER,name='LFE Playback Volume'
  ; type=INTEGER,access=rw---R--,values=1,min=0,max=39,step=0
  : values=0
  | dBscale-min=-58.50dB,step=1.50dB,mute=0
numid=18,iface=MIXER,name='Line Playback Switch'
  ; type=BOOLEAN,access=rw------,values=2
  : values=on,on
numid=17,iface=MIXER,name='Line Playback Volume'
  ; type=INTEGER,access=rw---R--,values=2,min=0,max=31,step=0
  : values=0,0
  | dBscale-min=-34.50dB,step=1.50dB,mute=0
numid=14,iface=MIXER,name='CD Playback Switch'
  ; type=BOOLEAN,access=rw------,values=2
  : values=off,off
numid=13,iface=MIXER,name='CD Playback Volume'
  ; type=INTEGER,access=rw---R--,values=2,min=0,max=31,step=0
  : values=0,0
  | dBscale-min=-34.50dB,step=1.50dB,mute=0
numid=24,iface=MIXER,name='Mic Boost'
  ; type=INTEGER,access=rw---R--,values=2,min=0,max=3,step=0
  : values=0,0
  | dBscale-min=0.00dB,step=10.00dB,mute=0
numid=20,iface=MIXER,name='Mic Playback Switch'
  ; type=BOOLEAN,access=rw------,values=2
  : values=on,on
numid=19,iface=MIXER,name='Mic Playback Volume'
  ; type=INTEGER,access=rw---R--,values=2,min=0,max=31,step=0
  : values=0,0
  | dBscale-min=-34.50dB,step=1.50dB,mute=0
numid=12,iface=MIXER,name='Mono Playback Switch'
  ; type=BOOLEAN,access=rw------,values=2
  : values=on,on
numid=26,iface=MIXER,name='Capture Switch'
  ; type=BOOLEAN,access=rw------,values=2
  : values=off,off
numid=28,iface=MIXER,name='Capture Switch',index=1
  ; type=BOOLEAN,access=rw------,values=2
  : values=off,off
numid=30,iface=MIXER,name='Capture Switch',index=2
  ; type=BOOLEAN,access=rw------,values=2
  : values=off,off
numid=25,iface=MIXER,name='Capture Volume'
  ; type=INTEGER,access=rw---R--,values=2,min=0,max=54,step=0
  : values=39,39
  | dBscale-min=-58.50dB,step=1.50dB,mute=0
numid=27,iface=MIXER,name='Capture Volume',index=1
  ; type=INTEGER,access=rw---R--,values=2,min=0,max=54,step=0
  : values=39,39
  | dBscale-min=-58.50dB,step=1.50dB,mute=0
numid=29,iface=MIXER,name='Capture Volume',index=2
  ; type=INTEGER,access=rw---R--,values=2,min=0,max=54,step=0
  : values=39,39
  | dBscale-min=-58.50dB,step=1.50dB,mute=0
numid=41,iface=MIXER,name='IEC958 Default PCM Playback Switch'
  ; type=BOOLEAN,access=rw------,values=1
  : values=on
numid=37,iface=MIXER,name='IEC958 Playback Con Mask'
  ; type=IEC958,access=r-------,values=1
  : values=[AES0=0x0f AES1=0xff AES2=0x00 AES3=0x00]
numid=38,iface=MIXER,name='IEC958 Playback Pro Mask'
  ; type=IEC958,access=r-------,values=1
  : values=[AES0=0x0f AES1=0x00 AES2=0x00 AES3=0x00]
numid=39,iface=MIXER,name='IEC958 Playback Default'
  ; type=IEC958,access=rw------,values=1
  : values=[AES0=0x04 AES1=0x00 AES2=0x00 AES3=0x00]
numid=35,iface=MIXER,name='IEC958 Playback Source'
  ; type=ENUMERATED,access=rw------,values=1,items=4
  ; Item #0 'PCM'
  ; Item #1 'ADC1'
  ; Item #2 'ADC2'
  ; Item #3 'ADC3'
  : values=0
numid=40,iface=MIXER,name='IEC958 Playback Switch'
  ; type=BOOLEAN,access=rw------,values=1
  : values=on
numid=34,iface=MIXER,name='IEC958 Playback Volume'
  ; type=INTEGER,access=rw---R--,values=2,min=0,max=39,step=0
  : values=0,0
  | dBscale-min=-58.50dB,step=1.50dB,mute=0
numid=43,iface=MIXER,name='IEC958 Capture Default'
  ; type=IEC958,access=r-------,values=1
  : values=[AES0=0x04 AES1=0x00 AES2=0x00 AES3=0x00]
numid=42,iface=MIXER,name='IEC958 Capture Switch'
  ; type=BOOLEAN,access=rw------,values=1
  : values=off
numid=36,iface=MIXER,name='IEC958 Capture Volume'
  ; type=INTEGER,access=rw---R--,values=2,min=0,max=31,step=0
  : values=23,23
  | dBscale-min=-34.50dB,step=1.50dB,mute=0
numid=22,iface=MIXER,name='Analog Mix Playback Switch'
  ; type=BOOLEAN,access=rw------,values=2
  : values=on,on
numid=21,iface=MIXER,name='Analog Mix Playback Volume'
  ; type=INTEGER,access=rw---R--,values=2,min=0,max=31,step=0
  : values=30,30
  | dBscale-min=-46.50dB,step=1.50dB,mute=0
numid=45,iface=MIXER,name='Beep Playback Switch'
  ; type=BOOLEAN,access=rw------,values=1
  : values=off
numid=44,iface=MIXER,name='Beep Playback Volume'
  ; type=INTEGER,access=rw---R--,values=1,min=0,max=15,step=0
  : values=0
  | dBscale-min=-45.00dB,step=3.00dB,mute=0
numid=31,iface=MIXER,name='Input Source'
  ; type=ENUMERATED,access=rw------,values=1,items=5
  ; Item #0 'Front Mic'
  ; Item #1 'Line'
  ; Item #2 'Mic'
  ; Item #3 'CD'
  ; Item #4 'Mix'
  : values=0
numid=32,iface=MIXER,name='Input Source',index=1
  ; type=ENUMERATED,access=rw------,values=1,items=5
  ; Item #0 'Front Mic'
  ; Item #1 'Line'
  ; Item #2 'Mic'
  ; Item #3 'CD'
  ; Item #4 'Mix'
  : values=0
numid=33,iface=MIXER,name='Input Source',index=2
  ; type=ENUMERATED,access=rw------,values=1,items=5
  ; Item #0 'Front Mic'
  ; Item #1 'Line'
  ; Item #2 'Mic'
  ; Item #3 'CD'
  ; Item #4 'Mix'
  : values=0
numid=10,iface=MIXER,name='Side Playback Switch'
  ; type=BOOLEAN,access=rw------,values=2
  : values=on,on
numid=5,iface=MIXER,name='Side Playback Volume'
  ; type=INTEGER,access=rw---R--,values=2,min=0,max=39,step=0
  : values=0,0
  | dBscale-min=-58.50dB,step=1.50dB,mute=0