I'm looking at expanding my performance equipment. I have asked Tim Lovell of Lovell Music Lab to make me a fixed band EQ or sorts that can be controlled via 3 voltage sensors. The idea is that these sensors will be embedded in a large sheet of glass standing upright between the audience and the performer. The proximity of a body part to the sensors will control a number of parameters in the filter unit. Namely 'Q', resonance and cutoff. Perhaps a switch to shift between HP, LP and BP.