Audio mixer
mixer [-@] [-c card] [-m device] [-o display_level]
- -@
- Show subchannel volumes.
- -c card
- The card ID of the mixer; the default is 0.
- -m device
- The device ID of the mixer; the default is 0.
- -o display_level
- Which settings are shown when the mixer starts up; display_level
  is one of:
  
- 1  --  display the playback settings.
  
- 2  --  display the record settings.
  
- 3  --  display playback and open-settings.
  
 
The mixer command starts the audio-mixer-control application:
 
|  | The components of the mixer window depend on your system's hardware. | 
The mixer uses the device
/dev/snd/mixerCcardDdevice,
where card and device are the values specified for the
-c and -m options.
Start mixer for AuReal vortex 2:
mixer &
or, specifying the card and device explicitly:
mixer -@ -c 0 -m 0 &
- libasound.so
- The shared object for the sound library.
- /etc/system/config/audio/card name.io-ado-cfg
- Where card name (set by the ado_card_longname() function) 
is the long name used by the driver and where mixer 
stores configuration data.
phplay,
phrecord