Added an array of capacitors to my Electroslush. 4u7 does not do much, 10u has a more audible effect. Changing the caps next to inductors has as a stronger effect. My plan is to build a capacitor myself (using mineral water as the conductor or electrolyte and plastic as the dielectric), use this cap as a filter on an audio amplifier circuit which will amplify the sound of the Electroslush (which will be listening to filter capacitor I build). This should make for an oscillator, which sound character is determined by the electromagnetic field of the diy mineral water capacitor.
I might use Tom Whitwells SimpleEQ (with exposed sockets for the capacitors next to the the bass and treble pots) and Mikrophonie as basis for the design. Electroslush -> Mikrophonie (or two for stereo) -> SimpleEQ (which capacitors are listened by the Electroslush) -> VCA/Output. In the long run I might combine the Electroslush and Mikrophonie into the same circuit.