Just set a bC8 to auto-repeat, and occasionally tweaked a knob. iphone left near loudspeaker, no fx or anything. It's all in there, if you tweak long-enough. A tip might be to set the 'WAVEFORM' control (knob#3) to more than 50%, use a slow LFO speed (knob#4) and set either ATTACK or DECAY knobs long, set MODULATION DEPTH (knob#2) to maximum, and the noodle with the PATCH control (knob#7), a...