above image from the collection of Joseph Rivers, Audio Playground, Orlando, FL
The Opus 3 is a string/brass/organ polyphonic instrument with a 49-note (C-C) keyboard. It features a very noisy chorus (which you are unable to put the brass section through) and 2 VCF's, one for brass section and one for the string section (with switchable high, low, or band-pass filtering and resonance). The Opus 3 features stereo outs and each of the sections can be panned.
[from The A-Z of Analogue Synthesizers, by Peter Forrest, published by Susurreal Publishing, Devon, England, copyright 1994 Peter Forrest]
Country Disco Choclate Covered Satan Group,
Electronic Dream Planet,
Lobster Jesus,
Brian Kehew and Roger Manning of The Moog Cookbook,
Opus 3,
The RentalsSonic Boom (of
Spectrum, E.A.R., and formerly of Spacemen 3),
Stereolab,
The Get Up Kids,
[Let us know if you have any further additions to this list.]