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adjusts the 'Master' channel's volume up by 1dB.
Can use command 'amixer' to see other channels :
Simple mixer control 'Master',0
Simple mixer control 'Capture',0
Replace "Master" with desired control name (e.g. Front, Earphone, PCM, etc.).
Checks whether your power supply is still plugged in.
If not it will trigger an alarm at maximum volume.
Mutes the speakers after an hour, in case you fall asleep watching a video...
I've had this as mute.sh in my ~/bin/ for some time.
this will increase the volume by 2 decibels on the pcm channel. the argument to -c is for which sound card to use, the arg after set is the channel (PCM, Master, etc.) and what to set by.
amixer -c 0 set PCM 2dB-
decrease volume by 2 decibels
amixer -c 0 set PCM toggle
this is for alsa systems
for mac os (and maybe other UNIX systems) osascript -e 'set Volume *' where * is any number (can have decimal points) between 0 and 10