Mute Spotify when ads are playing

Spotify.scpt

--Mute Spotify when ads are playing. Use if in a country where you can't
--purchase a pro account. Open AppleScript editor (Applications > Utilities)
--paste this script in and then go File -> Save As, change 'File Format' to
--'Application' and save somewhere. Run Spotify using that application.

set currentTrack to ""

do shell script "open -a \"Spotify\""
delay 5

repeat while appIsRunning("Spotify")
	tell application "Spotify"
		if player state is playing then
			if get sound volume > 0 then
				set defVolume to sound volume
			else
				set defVolume to 60
			end if
			
			set currentTrack to current track
			
			if currentTrack's name is "Spotify" then
				set sound volume to 0
			else
				set sound volume to defVolume
			end if
		end if
	end tell
	delay 2
end repeat

on appIsRunning(appName)
	tell application "System Events" to (name of processes) contains appName
end appIsRunning