I'm finding that when I get comfortable in a jam, that I tend to run octaves above the normal bass line - but I feel I have a good reason. Normally I think playing the bass line as it was done (in a cover song, that is) is all well and good. But when there aren't enough guitars or keyboards to pull off a decent rendering, it seems to me that if we can't pull the song off as originally played, that give me a license to get into guitarland and add some fill. Maybe I just take the bass up an octave - not throwing arpeggios and leads, just not staying in the same chord boundaries. If I don't go there, they can just sound hollow or weak - so should I not try to help fill the voids? Maybe I just shouldn't care - nobody blames the bass for a bad rendering - right? Heck, most people don't even know there's a bass in the mix anyway. But I find it kinda embarrassing if the group as a whole sucks for lack of depth. Thoughts?