Rock (Rock) or rock and roll (Rock'n Roll) is a musical instrument consisting of guitar, bass guitar. The main instrument is the drums. Simple music format focusing on the tough in media content.
Rock (Rock) and Rock and Roll (Rock'n Roll) is a music consisting of guitar, bass, drums, guitar is the main instrument. Simple musical form Strong emphasis on content produced.
Rock (Rock) or rock and roll (Rock 'n Roll) is a music of guitar, bass guitar, drums, a machine core music music format simple. Emphasis on content determination in the media.