in my experience of looped and iterative sounds, it's good to have something (anything) "outside" the loops to carry the narrative thread of the piece and give the audience something as a guide to the general direction of the music, since even evolving or non-synced loops can't really do this on their own for a normal audience.
in our case, the guitar provides the "familiar voice" amongst all the electronics, but even this is subject to a little looping. rather than build up great walls of noise, though, our guitarist is content to perform just the odd bit of brian may type self-harmonisation, and doesn't often loop himself for the sake of it. nor does he use the jamman on the theremin or any of the other electronic devices he might find in front of him.
meanwhile, however, I have recorded just about everything into jamman, repeaters, boss 1/2 rack pitch shifter, powertran mcs-1 and cheetah sx16. this latter- a rather budgety stereo sampler from the late 80s- was across the whole mix for one session and was good for a one-off stereo freeze lasting about 20 seconds (i.e. no overdubs). we found we could refresh the freeze with one button push but had to fade it out first or it would shut off abruptly.
I don't like looping bass guitar parts if there are real drums in the vicinity- it just feels antisocial somehow.
duncan.
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