Use dunstify to get notified about volume percentage and mute toggle

i3 config snippet for sound notifications

# i3 config relevant part

bindsym XF86AudioMute        exec --no-startup-id "amixer -q set Master toggle; /path/to/notify-volume-mute.sh"
bindsym XF86AudioRaiseVolume exec --no-startup-id "amixer -q set Master 3%+ unmute; /path/to/notify-volume-set.sh"
bindsym XF86AudioLowerVolume exec --no-startup-id "amixer -q set Master 3%- unmute; /path/to/notify-volume-set.sh"

notify-volume-mute.sh

#!/bin/bash

status=$(amixer sget Master | tail -n 1 | awk '{print $NF}')

if [ "$status" == "[off]" ]; then
    dunstify -t 500 -h string:x-dunst-stack-tag:volume Volume "🔇 muted"
else
    dunstify -t 500 -h string:x-dunst-stack-tag:volume Volume "🔊 unmuted"
fi

notify-volume-set.sh

#!/bin/bash

percent=$(awk -F"[][]" '/Left:/ { print $2 }' <(amixer sget Master))
dunstify -t 500 -h string:x-dunst-stack-tag:volume Volume "🔊 $percent"