Modified version of Marcin's script to control Spotify volume
Requires pactl (pulseaudio-utils on Fedora)
Raise volume 10%
spotifyvctl.py raise 10
Lower volume 5%
spotifyvctl.py lower 5
Original author: Marcin Kocur
Original source: https://wiki.archlinux.org/title/Spotify#Global_media_hotkeys
Attribution license: https://creativecommons.org/licenses/by/4.0/