Tim Orr created the PTP Synthesizer. It was a 4-voice analog polyphonic Synthesizer with 2 analog oscillators with per voice control, sync, noise generator, filter, two ADSR envelopes, and more. Very simple compared to Polysynth from that time. It used CEM ICs in its core.

This advertisement is from the Electronics Today (International) magazine, May 1981.

Sonically, it is a polysynth with a very rich, full analog sound in my opinion. For today’s times, it would be a bit too simple in the synth engine and also too big in design.