Script to get volume notification with dunst http://imgur.com/a/qWgAw

volume.sh

#!/bin/bash

# You can call this script like this:
# $./volume.sh up
# $./volume.sh down
# $./volume.sh mute

function get_volume {
    amixer get Master | grep '%' | head -n 1 | cut -d '[' -f 2 | cut -d '%' -f 1
}

function is_mute {
    amixer get Master | grep '%' | grep -oE '[^ ]+$' | grep off > /dev/null
}

function send_notification {
    volume=`get_volume`
    # Make the bar with the special character ─ (it's not dash -)
    # https://en.wikipedia.org/wiki/Box-drawing_character
    bar=$(seq -s "─" $(($volume / 5)) | sed 's/[0-9]//g')
    # Send the notification
    dunstify -i audio-volume-muted-blocking -t 8 -r 2593 -u normal "    $bar"
}

case $1 in
    up)
	# Set the volume on (if it was muted)
	amixer -D pulse set Master on > /dev/null
	# Up the volume (+ 5%)
	amixer -D pulse sset Master 5%+ > /dev/null
	send_notification
	;;
    down)
	amixer -D pulse set Master on > /dev/null
	amixer -D pulse sset Master 5%- > /dev/null
	send_notification
	;;
    mute)
    	# Toggle mute
	amixer -D pulse set Master 1+ toggle > /dev/null
	if is_mute ; then
	    dunstify -i audio-volume-muted -t 8 -r 2593 -u normal "Mute"
	else
	    send_notification
	fi
	;;
esac

Nice work! But you can improve this via using sh not bash and also you should change the timeout of the notifications because dunstify gets timeout info in milliseconds not seconds.

dunstify: command not found

You should install Dunst

When I use this the notification window itself gets larger/smaller together with the bar, but the example in the gif doesn't. What's happening?

Use -D pulse in get_volume and is_mute functions for consistency

dunstify: command not found

It seems dunstify is only included with dunst by default starting with version 1.5.0:

https://github.com/dunst-project/dunst/releases/tag/v1.5.0

For instance, if you installed dunst via apt on Ubuntu 18.04, you will not have it.

This didn't work "out of the box" for me on fedora 36. I made some modifications to get it to work, and added some customizations like choosing the bar character and added an "mtoggle" argument to toggle the microphone.

https://gist.github.com/kellya/c52c8a5dde8f530385156936a8326490

for whatever reason the notification disappears immediately, all other dunst notifications stay on the screen longer. (archlinux Hyprland, if it has any effect)

for whatever reason the notification disappears immediately, all other dunst notifications stay on the screen longer. (archlinux Hyprland, if it has any effect)

Found on dunstify --help
-t, --timeout=TIMEOUT The time in milliseconds until the notification expires

Change to a larger value. So "-t 1000" will be 1 second.