Published on Jan 14, 2018 Switched On
"Our demo of the rare keyboard-less Steiner-Parker Synthacon. Hosted by Samatha Glass of Holodeck Records. Serviced In January 2018 by Switched On in Austin, Texas."
via this auction

The Synthacon is rare and exceptional sounding 3 oscillator mono synth from the late 70's. It features switch based modulation routing with CV & Gate from the top. The signature Steiner Parker VCF offers rich filtering with powerful resonance and the 3 VCOs provide for stable robust sound source.
The modulation section consists of the Dual Envelope Generator, Trigger Generator, and Sample & Hold section. The Trigger generator is a square wave LFO capable of cycling the Envelope Generator. The Sample & Hold is fed by VCO 3 which allows you to route Noise as well as any of the waveforms for processing and can be triggered from either the Trigger Generator or the S-Trig input. Also any of the VCOs can used in the LFO range.
VC IN 1 is routed throught the S&H section, VC IN 2 is the standard 1v/Oct input, VCF IN is the CV input for filter cutoff, SIG IN routes external signals through the filter, and the Trig in is routed from the Cinch Jones port."