Vol. 4 is the fourth studio album by the English heavy metal band Black Sabbath, released in September 1972. It is a highly influential record in the heavy metal genre, known for its experimental sounds and classic tracks like "Supernaut" and the ballad "Changes"

Tracklist : 

Side A

1. Wheels Of Confusion
2. Tomorow's Dream
3. Changes
4. FX
5. Supernaut

Side B

1. Snowblind
2. Cornucopia
3. Laguna Sunrise
4. St. Vitus' Dance
5. Under The Sun