Happy 70th Birthday to Black Sabbaths Geezer Butler

Butler wrote the lyrics of "Black Sabbath" and has significantly influenced the style of the band through his lyrics. He was one of the first bassists to use the wah-wah effect.This effect pedal and its lower tuned bass have inspired many well-known bass players to use the device and the corresponding settings as well. In the meantime, the lower parts are a stylistic device that is characteristic of metal bands. 

Happy Birthday Geezer Butler