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@kjetilho
Created September 15, 2020 15:35
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a script to adjust volume. it will try to use the most recent audio card by default.
#! /bin/bash
case $1 in
-c)
card=$2; shift; shift;;
*)
card=$(awk '/digital audio playback/ {c = substr($0, 7, 2)} END {print c}' /proc/asound/devices)
;;
esac
if [ $# -eq 2 ]
then
channel="$1"; shift
else
# get name of simple mixers with p(layback) volume
channels=($(amixer -c $card scontents |
awk 'BEGIN{RS="Simple mixer control "} /pvolume/ {print $1}' |
cut -d, -f1))
# without an index, an array variable expands to first element
channel=$channels
fi
if [ $# != 1 ]
then
cat <<EOF >&2
Usage: $0 [-c CARD] [<channel>] <adjustment>
Examples:
volume_adjust toggle -- toggles mute on/off
volume_adjust 5%+ -- increase volume by 5%
EOF
printf "Available controls for card %d: %s\n" $card "${channels[*]}"
exit 64
fi
case $1 in
[0-9]*)
amixer -c $card set $channel $1 >/dev/null ;;
mute|unmute|toggle)
pasink=($(pacmd list-sinks | awk '/[*] index:/ {i=$3} i && /muted:/ {print i, $2; exit}'))
case "$1:${pasink[1]}" in
mute:*) mute=true ;;
unmute:*) mute=false ;;
toggle:yes) mute=false ;;
toggle:no) mute=true ;;
*) echo "wha? [$1] [${pasink[@]}]"; exit 1 ;;
esac
pacmd set-sink-mute ${pasink[0]} $mute
esac
pkill -USR1 -x i3status
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