The bass guitar is the black sheep of the standard rock band configuration. It’s a well-worn saw among rock musicians that the bass exists simply to fill in the audible frequencies not covered by the rest of the band. Bass is considered simple enough that anyone with a shred of musical acumen can pick it up in a pinch. However, some musicians take its black sheep status as a challenge. Groups like Primus invert the usual bass/electric guitar dynamic, with Les Claypool’s lead bass augmented by Larry LaLonde’s adventurous guitar work. In extre…