The Korg Prophecy is a monophonic synthesizer released by Korg in 1995. It uses MOSS (Multi Oscillator Synthesis System) to emulate analog synthesis, FM, and physical modelling. It offers five synthesis methods encompassing nine oscillator types: analog, variable phase modulation, brass, reed, and plucked string modelling, noise with comb filtering, and three types of analog-style models — sync, ring modulation, and cross modulation — collectively referred to as 'MOD'. Each oscillator is processed by a linked waveshaper for generating distortion or resonance effects. The signal, combined with outputs from a sub-oscillator and noise generator, and feedback, is then fed through two multi-mode filters, which can be arranged in series, parallel, or split configurations. The Prophecy's modulation options include six multi-stage envelopes and four low-frequency oscillators (LFOs) with a selection of 30 types. The keyboard features velocity sensitivity and aftertouch and is complemented by three physical wheels dedicated to pitch bending, modulation, and the Wheel 3, a cylindrical control that combines a modulation wheel with a pressure- and position-responsive ribbon controller. It is equipped with five programmable Performance Editors (PE) knobs, each of which can control up to four parameters simultaneously, enabling precise manipulation of aspects like filter cutoff frequencies, envelope attack times, filter resonance, and stereo panning with a single turn. KORG was the first company to feature effects on a synthesizer, and the first to use a sample + synthesis sound design.
Monophonic by design, built to model — not mimic — analog, FM, and physical sources in real time.
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The signal path is the interface
Nine oscillator types, each with its own waveshaper, feed two flexible multi-mode filters.
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Performance is baked in
Six envelopes, four LFOs, and Wheel 3 give granular, physical control over evolving sounds.
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Effects and samples, built in
It proved sample+synth and embedded effects weren’t add-ons — they belonged in the voice.
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Worth your time?
Yes. Use the whole thing.
4/ 5
What works
integrates sample-based and synthesis-based sound generation more tightly than any prior synth
embeds effects processing directly into the voice architecture
What does not
support polyphony
include a sequencer or arpeggiator
offer USB audio or DAW sync
Use it if
players who prioritise monophonic lead, bass, and evolving textures with tactile, wheel-and-knob immediacy
Skip it if
producers needing chords, pads, or seamless DAW integration
Who should use it, and who should skipHide who it is for
The written brief1 min read
What it is and what it was built for
A monophonic synthesizer released by Korg in 1995. Built to deliver expressive, performance-driven sound design using virtual modelling — not emulation — of analog, FM, and physical sources.
How it works, in terms a player would use
It routes nine oscillator types — analog, brass, reed, plucked string, noise-with-comb, and three MOD variants — each through its own waveshaper. That signal joins a sub-oscillator and noise generator, feeds feedback, then splits across two multi-mode filters configurable in series, parallel, or split. Six multi-stage envelopes and four LFOs (30 types) modulate it. Wheel 3 gives pressure- and position-responsive control. Five PE knobs each map to up to four parameters — filter cutoff, resonance, envelope attack, panning — for real-time performance editing.
What it does better than anything else
It integrates sample-based and synthesis-based sound generation more tightly than any prior synth. It embeds effects processing directly into the voice architecture — not as an afterthought, but as part of the signal path from oscillator to output.
What it does badly
It is monophonic. It offers no polyphonic layering or chordal play. Its real-time editing is powerful but narrow: the five PE knobs are fixed per patch, not freely assignable across all parameters. It has no built-in sequencer or arpeggiator.
What people made with it
The document does not specify what people made with it.
Who should use it, and who should not
Players who prioritise monophonic lead, bass, and evolving textures with tactile, wheel-and-knob immediacy. Not for producers needing chords, pads, or seamless DAW integration.
Is it worth your time
Yes, if you need monophonic expressiveness with physical modelling, FM, and sample+synth integration in one instrument. No, if you need polyphony, deep hands-on patching, or modern workflow features like USB audio or DAW sync.
