amixer is a command-line mixer for ALSA(Advanced Linux Sound Architecture) sound-card driver. amixer can support multiple soundcards. amixer with no arguments will display the current mixer settings for the default soundcard as well as the device. This is a good way to see a list of the simple mixer controls that you can use.

Syntax:

amixer [-option] [command]

Commands and Options:

• -h or –help : Displays help and then exits.

  

• –info : Displays the info and then exits.

  

• –scontols : Displays a complete list of simple controls and then exits.

  

• –scontents : Shows a complete list of simple mixer controls and their contents as well.

  

• set or sset : Sets the contents of the simple mixer.

  

• get or sget : Shows the control contents of the simple mixer.

  

• controls : Displays a complete list of the card controls.

  

• contents : Displays a complete list of the card controls with their contents as well.

  

• cset : Is used to set the card controls.

  

• cget : It shows the card control contents. The identifier has the same syntax as for the cset command.

  

• -c : Selects the card number that needs to be controlled.

  

• -D : Selects the device name that needs to be controlled.

  

• -s or –stdin : Read from stdin and execute each command sequentially.

  

• -q : Does not display the result of the changes.

  

• -R : Uses the raw value for evaluating the percentage representation which is also the default mode.

  

• -M : Uses the mapped volume for evaluating the percentage representation like alsamixer, to be more natural for the human ear.

  

• -v : Displays the version.