ALSA or the Advanced Linux Sound Architecture provides audio support for Linux. It is a replacement for the old OSS linux sound system. The Alsa-utils package contains both the Alsamixer and Amixer utilities.
You can control the audio properties of your sound cards through:
- Alsamixer-The graphical interface for ALSA
- Amixer-The command based utility for ALSA
CLI Utilities
Alsamixer
ncurses based utility with visual representation of various levels.
alsamixer
Amider
Command line, operation performed per command.
amixer -c [card-number] set [control] [value]
To see what controls you can manage
amixer scontrols
If you are sudo there are more controls available
sudo amixer scontrols