Korg PS-3200 (1979–1981)

A 61-key polyphonic giant that gave every note its own complete synthesizer — no voice sharing, no compromise.

Overview

The Korg PS-3200 is the kind of instrument that makes modern synthesizer owners weep into their menus. At a 1979 list price of $5,795, this was Korg's flagship — a performance-oriented polyphonic synthesizer that treated each keypress with an almost absurd level of respect. Instead of the typical poly synth architecture where voices are assigned and shared across notes, the PS-3200 gives every single key its own complete VCO/VCF chain. Nothing is multiplexed, nothing is shared. Press a chord and each note gets the full, unimpeded circuit of a dedicated mono synthesizer.

This was not a small commitment. The PS-3200 ran from 1979 to 1981, positioned as the more affordable sibling to the legendary PS-3300 (which was itself extremely expensive and rare). Where the PS-3300 packed 48 VCOs, the PS-3200 uses 12 — but it compensates with built-in effects and a sequencer, making it the more practical, stage-ready instrument of the pair. Owners report a rich, warm sound that feels genuinely musical, and the build quality is excellent throughout, even if the sheer heft of the thing makes you think twice about touring with it.

Sound on Sound (2001, p.257) noted that the PS instruments were "quite unwieldy" but acknowledged the PS-3200's unique position, particularly its 16-memory patch storage facility — a rare convenience in a series that largely lacked user memories. The keyboard is very playable, and there are plenty of knobs to twiddle, which is exactly what you want from an instrument of this vintage.

Key Features

True 48-Note Polyphony — No Voice Stealing

Here's the headline feature that still makes engineers scratch their heads: the PS-3200 offers 48-note true polyphony. That means no voice assignment scheme, no note-stealing, no "oh, you played a 9th chord and the architecture dropped the 7th." Each key on the 61-key keyboard has its own complete VCO/VCF chain, reproducing the same circuit as a mono synth for every single note. The result is that dense chords don't thin out or change character as you add notes — each voice stays fat and present. (Note: some forum discussions claim 64-voiced operation, but the 48-note figure from vintagesynth.com is the more commonly cited specification.)

12 VCOs, Two Per Voice

Each voice in the PS-3200 is built around two VCOs, giving you 12 oscillators total across the instrument. This is a hybrid design that draws from the earlier PS-3100, but with a key difference: the audio path is built entirely from discrete components — no integrated circuits or chips in the signal chain. That means the oscillators have a certain rawness, a slight instability that digital emulations still struggle to replicate. Two oscillators per voice means you can detune them against each other for that classic thick analog chorusing effect, or lock them together for a more focused tone.

24dB/Octave Lowpass Filters

Each VCO pair is assigned to a 24dB/octave lowpass filter, giving you two filters per voice. The filter is a 24dB/octave lowpass design, and it's worth being honest about its character: Sound on Sound (2001, p.255) called the PS-series filter "the biggest disappointment," noting that it makes it "very difficult to produce classic big filter sweeps." This isn't a Moog-style ladder filter that screams when you open it up. Instead, it's more of a textural tool — better suited to shaping and coloring than dramatic sweeps. The modulation control over the filter, however, is where the PS-3200 starts to shine, offering subtle movement that rewards patient programming.

Dual ADSR Envelopes and Dual Digital Delay

Every voice gets two ADSR envelope generators, which is generous for a poly synth of this era. But the real surprise is the dual digital delay effects built right into the instrument. This was a forward-thinking inclusion for 1979 — most synthesizers of the period required external effects units for any kind of echo or spatial processing. Owners consistently praise the digital delay as a fantastic addition, and it's a big part of why the PS-3200 feels like a complete instrument rather than just a sound source. The delay opens up the PS-3200's sonic palette considerably, turning what could be a dry, clinical poly synth into something atmospheric and immersive.

Patch Memory and 32-Step Sequencer

The PS-3200 includes patch memory for 4 presets — a modest number by modern standards, but practically luxurious compared to its sibling the PS-3100, which lacked user memories entirely. Combined with the 32-step sequencer, the PS-3200 was genuinely performance-oriented. You could program a sequence, layer it with live playing, and run the whole thing through the digital delay for a one-person show that would have been unthinkable on most other poly synths of the era.

LFO with Two Waveforms

The LFO offers two shapes — triangle and square — which covers the essentials for vibrato, tremolo, and filter modulation. It's not the most elaborate modulation section you'll find on a vintage synth, but it's functional and musical. The triangle wave is smooth and organic for pitch and filter movement, while the square wave gives you stepped, rhythmic modulation when you need it.

Historical Context

The PS-3200 was Korg's top-of-the-line synthesizer at the time of its release, sitting at the apex of the PS series — Korg's Preset/performance synthesizer line. The family tree runs PS-3100 as the predecessor, PS-3200 in the middle, and PS-3300 as the larger, more complex sibling above it. The PS-3100 didn't offer true polyphony in the same way; the PS-3300 and PS-3200 share a similar voice architecture but differ dramatically in size and complexity.

Korg designed the PS-3200 as the more affordable version of the PS-3300, which was so expensive and rare that it bordered on mythical. The PS-3300 packed 48 VCOs, making it one of the most elaborate analog synthesizers ever built. The PS-3200, by contrast, was more performance-oriented, with its built-in effects and sequencer making it a practical instrument for live use rather than a studio monument. Korg quietly dropped the PS series around 1980-81, settling into a more mainstream groove with the subsequent Poly 6/61 and DW synthesizers, according to Sound on Sound (2001, p.257).

Collectibility & Value

The PS-3200 is very rare and extremely collectible. Functional units typically change hands in the $7,000–$12,000 range depending on condition — a significant premium over the original $5,795 list price, though not as stratospheric as PS-3300 prices, which have gone into the six figures. Finding one in fully working condition is genuinely difficult. Many units suffer from broken patch memories or stuck keys, and the plastic bus bars used in the keyboard contacts are known to become brittle and break with age.

If you're considering a purchase, budget for maintenance. Capacitors in these units often need replacement after decades of use, especially in the power supply, and certain parts — like key contacts and some ICs — are no longer manufactured. The keyboard action is somewhat "clacky" or noisy compared to later synths, which some owners note as a minor annoyance. The lack of MIDI is also a real limitation in a modern studio context, though Kenton Electronics provides a retrofit that adds MIDI In for note on/off messages, making the PS-3200 considerably more usable in a contemporary setup.

Despite these caveats, owners are passionate about the PS-3200. The sound alone is worth the price of admission, as one forum commenter put it. It feels like an instrument in the truest sense — something you play, not just program. The discrete-component audio path gives it a voice that's hard to replicate, and the built-in digital delay adds a dimension that most of its contemporaries simply didn't have. If you can find one that's been properly serviced, and you have the budget and the back strength to handle it, the PS-3200 is a genuine piece of synthesizer history that still delivers musically today.

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