Buchla 200 analogue modular in action. The touch keyboard is working as one 16 note sequencer while the smaller 5 x 4 sequencer makes the other sequence..
Some more buchla. The chords are set up by the 5 x 4 sequencer which is just triggered from the 4 touch plates on the left. The sequence is one oscillator sequenced from the main touchpad.
Here is a really nice guitar synth setup using the Analogue Systems rs35 module along with 5 other A.S. modules. The rs35 module does a remarkable job of turning the guitar's pitch into CV (control-voltage). There is no MIDI involved in this setup.
Using EML Polybox, you can make polyphonic sound with 1 VCO monophonic synthesizer. Connection is Korg MS-10(1VCO synth) VCO out (customized) --- Polybox --- MS-10 VCF in