The Opus-3 is one great little synth. It was designed by Herbert A. Deutsch from Hofstra University who originally nudged Dr. Robert Moog into building synthesizers and later served as director of sales & marketing for Moog Music. Herb also wrote the owner's manual. The sounds are broken up into 3 categories: Strings, Brass and Organ. Strings and Brass have their own separate VCF (filter) sections, the Organ section has none. The Opus-3 also has 2 sound outputs for an early stereo effect with panning! It's a colorful little synth with clearly laid out sliders and is fairly straight forward. It has classic analog Moog sound quality and is a great source of some string and lower octave techno-organ sounds. It is used by Stereolab, Kraftwerk, Zonetech, 808 State and The Rentals.

Ricard

May 30, 2013 @ 5:45 am

Since it uses top octave divider technology, it is fully polyphonic. However, the VCF is common to the whole machine, so it doesn't have 49 completely separate voices like for instance a Korg PS-3100, 3200 or 3300.

John from Supergiantpdx.com

April 28, 2013 @ 2:31 am

I love this Keyboard. The Organ, String and Brass sections are very flexible. It's got a real Moog meat and grit to it. Best part about it is the super wide +5/-4 pitch wheel. Get your slide on! :)

EMwhite

April 9, 2013 @ 10:27 am

It's 49 key polyphonic but not in the traditional discreet oscillator grouping fashion. It's a Divide Down architecture using a high frequency TOG similar to other string machines. But it has a discreet 4-pole low pass Moog filter, a 3 phase stereo chorus, and a very nice LFO with delay and vca fade in. Certainly it's just a single filter which can do legato triggering or re trigger on every key; not ideal for every style of playing.

Strong points are certainly the String chorus and high/low pass filter (does not resonate as it should not). Brass filter is excellent.

Paco

April 9, 2013 @ 6:21 am

Nothing moogy about this "synth". It's basically a string/brass-organ. It's not a synth, and it's not at all the polyphonic Moog in the way that you dream of it to be. Trust me.

martin 200

March 26, 2013 @ 1:47 pm

Not played or met one, but i would guess, if its like many other string synths, then it would be fully poly.

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