11.2.2.3. Volume control
aumix and alsamixer are two common text tools for adjusting
audio controls. Use the arrow keys to toggle settings. The
alsamixer has a graphical interface when
started from the Gnome menu or as
gnome-alsamixer from the command line. The
kmix tool does the same in KDE.
Regardless of how you choose to listen to music or other sounds,
remember that there may be other people who may not be interested
in hearing you or your computer. Try to be courteous, especially in
office environments. Use a quality head-set, rather than the ones
with the small ear pieces. This is better for your ears and causes
less distraction for your colleagues.