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

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.