Black Sabbath Vol. 4 (often shortened to Volume 4) is the fourth album by the British heavy metal band Black Sabbath, released in 1972. The album was originally to be titled Snowblind, after one of several songs referring to cocaine use, and features several Sabbath classics, such as "Tomorrow's Dream," "Snowblind," "Supernaut" and "Changes." Volume 4 demonstrates Black Sabbath beginning to experiment with the heavy sound they had become known for. Although some songs are in their trademark style, others demonstrate a soft, orchestral approach. This is exemplified by the song "Changes". Written by Tony Iommi, it is entirely in Read more on Last.fm.