the fuzz octave/low pass filter sound is what I get from the eh bass microsynth, on electric though. I will say the boss oc3 has a cool fuzzy octave/synth setting that might work, you can get the sound used on Gwen Stefani song "hella good" with this settingHas anyone tried the Wonderlove/enigma Qballs on upright? I currently have an old EHX Microsynth, and trying to get a fuzz/octavey sound for the upright....any advice from the group?