audiobriefs
11:12in productionCh. 1 · Price & Voice Count/ 11:12 · ceiling 15 min
Synths & drum machines · Instruments

Korg Poly-800

The first sub-$1,000 programmable polyphonic synth — but its shared filter means chords lie to you.

The Korg Poly-800 is an 8-voice analog synthesizer released by Korg in 1983. It was the first fully programmable polyphonic synthesizer that sold for less than $1,000. It was designed for portability, featuring battery power and a lightweight design that allowed the user to play with it strapped around their neck. It utilised digitally controlled oscillators (DCOs), and was a paraphonic synth with a single filter shared between its eight voices. Each DCO offers sawtooth and square waveforms, which are mixed together with a white noise generator before being sent to a voltage-controlled filter (VCF). The Poly-800 features 2 polyphony modes: Whole mode offers 8-voice polyphony with one DCO per voice, while Double mode places the DCOs in pairs for a richer sound, albeit at the expense of reducing polyphony to four voices. The VCF is shared across all voices, which means the Poly-800 is technically a paraphonic synth, instead of a polyphonic synth. The filter can be set to either single or multiple trigger modes; in single mode, the envelope is triggered by the first key press and won't re-trigger until all keys are released. Multi mode allows each key press to trigger the filter envelope independently.

Chapters & takeaways5
  1. 1:00
    Price & Voice Count

    It was the first fully programmable polyphonic synth under $1,000 — an 8-voice analog instrument released in 1983.

  2. 2:39
    Portability vs Paraphony

    Battery power and a lightweight chassis let you wear it like a keytar — but its single shared filter makes it paraphonic, not polyphonic.

  3. 4:17
    Sound Architecture

    Each voice offers sawtooth, square, and white noise — but all route through one VCF, with Whole and Double modes trading voice count for thickness.

  4. 6:04
    Filter Trigger Modes

    Single trigger mode locks the filter envelope on the first note pressed; Multi mode lets each key re-trigger it — a core limitation and creative lever.

  5. 7:20
    Keytar First

    Its 8-voice analog engine fits in a strap-on shell — a design that prioritised mobility over voice independence.

Worth your time?

Yes. Use the whole thing.

3.5/ 5
What works
  • 8-voice analog synthesis in a strap-on form
  • immediate joystick and filter trigger control
  • Double mode for thicker stacked tones
  • cassette patch backup (with patience)
What does not
  • true polyphony
  • velocity sensitivity
  • battery-free memory
  • cassette-free patch storage
Use it if
  • players who prioritise mobility and hands-on paraphonic layering
  • modders and tinkerers
Skip it if
  • players needing expressive dynamics
  • studio users requiring reliable recall
The written brief1 min read

What it is and what it was built for

An 8-voice analog synthesizer released by Korg in 1983. Built for portability: battery-powered, lightweight, designed to be played strapped around the neck as a keytar.

How it works, in terms a player would use

It uses eight digitally controlled oscillators, each offering sawtooth and square waveforms mixed with white noise before a single shared voltage-controlled filter. You choose between Whole mode (eight voices, one DCO per voice) or Double mode (four voices, two DCOs per voice). The filter triggers in Single mode — once per chord — or Multi mode — once per key press. The keyboard is non-velocity-sensitive. A joystick controls pitch bend and modulation. Early units retain patch memory only with batteries; patches back up to cassette.

What it does better than anything else

It delivers eight-voice analog synthesis in a lightweight, battery-powered keytar form — unmatched for mobility and strap-on playability in 1983. Its joystick, Double mode, and filter trigger options give immediate, physical control over paraphonic texture.

What it does badly

It cannot articulate multiple notes independently through the filter. Chords choke the envelope in Single mode. The non-velocity keyboard gives no dynamic control. Battery-dependent memory fails without maintenance. Cassette backup is slow and unreliable.

What people made with it

The sources do not specify what people made with it.

Who should use it, and who should not

Players who value physical portability, hands-on paraphonic layering, and mod-friendly hardware should use it. Players who rely on velocity expression, stable patch recall, or independent voice filtering should not.

Is it worth your time

Yes — if you want a portable, tactile, paraphonic analog synth that rewards hands-on tweaking and modification. No — if you need true polyphony, velocity response, or stable memory without batteries.

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Yamaha CS-80Yamaha · 1976The Yamaha CS-80 is an analog synthesizer introduced in 1977. It supports true 8-voice polyphony, with two independent synthesizer layers per voice each with its own set of front panel controls. It has a layered keyboard that is both velocity-sensitive and pressure-sensitive, with polyphonic aftertouch and a ribbon controller for polyphonic pitch-bends and glissandos. Production of the instrument ceased in 1980.
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