MOOG OPUS 3

via this auction
"The Moog OPUS 3 is a polyphonic analog synthesizer with a 49-note (C-C) keyboard.

The OPUS 3 features three sections - strings, organ and brass. Each offers a single VCO for sound generation. The oscillators' ranges vary from 8' - 4' (string) to 16' - 1' (organ). For the organ and brass parts there's a resonant multi-mode (low, high, band-pass) VCF, with its own envelope generators and controls for cut-off and resonance. A switch to choose between preset and manual filter modes for the brass is also featured. A simple LFO can be routed to FM or VCF modulation, and has controls for amount, delay (up to 20 seconds) plus rate. VCA controls only include volume panning for the stereo outputs.

A chorus effect is available for the string and organ sections, with adjustable depth, delay and rate. Other features include the tuning knob and pitch bend wheel. There is only a single preset sound for each section, with no user programmable patch section."