For people like me who cannot live without listening to music, controlling volume level and different channels is crucial. In Linux console for everything up to now that I am using it, there is a replacement of GUI. There are many applications for to control volume in text-mode as well.
Here, I just want to introduce one which I like it and is very handy.
Amixer is a simple text-mode mixer control which allows you to control volume level.
Using it is really simple, here I put some example of how to use it.
Shows all available channels.
$ amixer set Master 0
Set master channel to zero. Bear in mind that master should be written with capital M.
$ amixer set Master 5+
Increases 5 level of the master channel volume. Again be careful about the place of ‘+’ sign.
$ amixer set Master 5-
Decreases 5 level of the master channel volume. More information is available in man page of Amixer.
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