heard a Steve Vai tune the other day .. Little Alligators, and the bass tone on the recording had a noticeable "crunch" to it, but not outright fuzz or distortion. Also, recall hearing some of Roscoe Becks playing on some of Robben Fords CD's and hearing a definite touch of this same kind of effect. So, my question is, how is this done ? putting a bit of cruch into your sound without it sounding like a total buzz-saw, and also basically staying with a true clean and full bass tone. I read on Roscoe's website that he uses an SWR Interstellar Overdrive, and also mentions one other overdrive pedal that may be out of production. I am not an effects player, but this is an interesting idea to me and I'm interested in how to get this kind of tone.