I just posted a new clip on Soundcloud.  I recorded this in three takes,  One voice is my normal clean violin with a pitch glide, faded in and out on Exp-1.  Second voice is my echo washy patch, and the third is my digeridoo patch, which is a Hiway 100, parallel sub octave fuzz and facial fuzz, and and a growler after the parallel chain.  I used a volume pedal before the amp, and one after the effects blocks.  Both use Exp-1, but they are set to have opposite sweeps so the volume is constant, but the signal going into the fuzz and growler varies, giving the filter sweep.  The drum track was done in Propellerhead Figure.