i'm interested in doing some compete compositions with drums, bass and guitar, but i don't have a bass.

i was wondering if anyone knew of some software that would allow me to take bass lines recorded by a guitar and drop it an octave and use it as a proper bass line?
Audacity has a pitchshifter

Tell me what nation on this earth, was not born of tragedy-Primordial
It won't sound much like a bass, it will just sound like a guitar being played an octave lower - basses have thicker strings which make the timbre of the instrument completely different. You would probably get better results if you sequence it.
Quote by griffRG7321
become a circumsizer, you get like £60,000 a year + tips.

Quote by Flying Couch
Because I'm not aerodynamic. All the other airborne furniture laugh at me.