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Just annotations of little "how to's", so I know I can find how to do something I've already done when I need to do it again, in case I don't remember anymore, which is not unlikely. Hopefully they can be useful to others, but I can't guarantee that it will work, or that it won't even make things worse.
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Bash script to create a unified pactl-rexima-amixer command

Posted 06-23-2019 at 11:32 PM by the dsc
Updated 06-23-2019 at 11:39 PM by the dsc

For reasons I don't fully comprehend, every now and then, one or more of these tools won't work, but hopefully at least one will. In order to preserve openbox' rc.xml key bindings, I came up with this script that "unifies" simple commands to lower or increase the volume:
rexima vol ${1} && exit 0
pactl set-sink-volume 0 ${1}% && exit 0 
pactl set-sink-volume 1 ${1}% && exit 0
val=${1#+} ; val=${val#-} 
amixer -q sset Master ${val}%$(echo $1 | sed 's|[0-9]||g')
Basically, if any command succeeds, the script exits, and goes to the next if a command fails. The amixer command has all that sed stuff and string manipulation because that was how I managed to take a +N or -N input and transform it into N%+ or N%- respectively.

I don't quite get the whole pactl sink thing, it also seem to have alternated between "1" and "0" for it to work at some point.

I named it "volset," you can name it whatever you want. The syntax is just the script name followed by a number, alone for an absolute percent volume, or preceded by + or - to add or subtract a percentage.
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