Embedded Player Geezer Butler is patient zero for heavy metal bass riffs. He played bass for Black Sabbath. One of the greatest rock bands of all time and true pioneers in the heavy metal genre. Along with playing bass, Butler was also a songwriter for the group. He wrote or co-wrote so many of Sabbath's greatest tunes: Iron Man, Paranoid, The Wizard, After Forever. Butler recently released a memoir. It's called Into the Void: From Birth to Black Sabbath―And Beyond. Geezer Butler joins Bullseye to talk about his new memoir. He also looks back and shares some stories from his time in Black Sabbath. Plus, he'll get into what it was like to write songs for Ozzy Osborne to sing.