nix/package/swayscript/script/Sound.sh

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function sound_output_cycle() {
notify_short
local IFS=$'\n'
local current=$(pactl get-default-sink)
local all=($(pactl list short sinks | cut -f2))
local i_current=$(_index_of ${current} ${all[@]})
local i_total=${#all[@]}
((i_total--))
local i_target=0
[[ ${i_current} -lt ${i_total} ]] && i_target=$((i_current + 1))
pactl set-default-sink ${all[${i_target}]}
}