Bass is more than just a guitar with two fewer strings. It has a different tone, scale length, feel and musical role, and in many cases it requires a different conceptual and technical approach. Guitarists who are new to playing bass will often double the guitar part one octave lower. There is certainly a place octave doubling — just listen to Aerosmith's "Sweet Emotion," Led Zeppelin's "The Ocean" and Pantera's "I'm Broken." But there is so much more that can be done with the bass guitar.