Patch: (w/2 in tape mode, 3 sisters in crossover)
Music > 3S All
3S All > W/ input
(monitor set to zero, record set low to allow many layers, I had it set up like a longish tape echo loop)
W/ output > 3S low
3S high and low out to mixer/output.
Three Sisters Freq controls the mix, and feedback. I kept span mostly at noon, but moving it can make it more or less hairy 