audiobriefs
9:25in productionCh. 1 · A Trident for the rest of us/ 9:25 · ceiling 15 min
Synths & drum machines

Korg Delta

It promises unlimited polyphony—but gives you one envelope for all notes.

The Korg Delta is a 1979 analog semi-polyphonic string machine and synthesizer. It was built as a slimmed-down, budget alternative to the Korg Trident. It splits into two independent sections—Strings and Synth—with dedicated outputs. The String section uses two pitch sliders and tone/ADSR controls. The Synth section uses four pitch sliders, white noise, a multimode 24dB/oct filter, and full ADSR. A joystick provides pitch bend and modulation. It has CV/gate connectivity but no memory, no MIDI, and no presets. Its 'unlimited polyphony' is inaccurate: pressing multiple keys does not apply independent envelopes to each note. It delivers high-quality layered string-and-synth sounds despite limited range. Its build is robust, but its keyboard is fragile and its filter is bland.

Chapters & takeaways4
  1. 0:56
    A Trident for the rest of us

    It is a budget Trident clone designed to mimic both string machines and organs.

  2. 2:20
    Strings and synth, side by side

    Two fully independent sections—with separate outputs, sliders, filters, and envelopes—controlled by hand and joystick.

  3. 3:48
    Polyphony without independence

    Full 49-note polyphony prevents note starvation—but envelope sharing undermines polyphonic expression.

  4. 5:26
    No recall. Just response.

    No memory, no MIDI, no presets—just voltage control, gate, and immediate sound shaping.

Worth your time?

Yes. Use the whole thing.

3.5/ 5
What works
  • full 49-note polyphony
  • separate string and synth outputs
  • hands-on slider-based sound shaping
  • joystick modulation
What does not
  • arguably
  • perhaps
  • in many ways
  • seminal
Use it if
  • players who value tactile control, discrete signal routing, and vintage analog texture over flexibility or reliability
Skip it if
  • those needing stable per-note envelopes, preset libraries, or MIDI sync
The written brief1 min read

What it is and what it was built for

A 1979 analog semi-polyphonic string machine and synthesizer built as a slimmed-down, budget alternative to the Korg Trident. Designed as a hybrid string/organ instrument, it prioritises immediacy and physical control over flexibility or recall.

How it works, in terms a player would use

It splits into two independent sections: Strings and Synth, each with dedicated outputs. The String section uses two pitch sliders (16’ and 8’), Bass/Treble tone controls, and variable Attack/Release. The Synth section uses four pitch sliders (16’, 8’, 4’, 2’), white noise, a multimode 24dB/oct filter (low-pass, high-pass, band-pass), and full ADSR. A joystick handles pitch bend and modulation. CV/gate ins and outs are present, but no memory, no MIDI, no presets.

What it does better than anything else

It delivers a classic layered string-and-synth sound with full 49-note polyphony—no note starvation—and separate outputs for clean mixing. Its simplicity forces direct, tactile decisions, yielding characterful results despite limited sound range.

What it does badly

Its ‘unlimited polyphony’ is misleading: pressing multiple keys does not apply independent envelopes to each note, causing unnatural attack behaviour when layering. The filter is described as bland. The keyboard is fragile. It has no patch memory or MIDI.

What people made with it

Layered string-and-synth pads and drones—especially where full polyphony and separate outputs enabled clean blending in live or studio settings. Its character comes from juxtaposing basic string textures with raw synth tones.

Who should use it, and who should not

Players who value tactile control, discrete signal routing, and vintage analog texture over programmability or reliability. Not for those needing stable per-note envelopes, preset libraries, or MIDI sync.

Is it worth your time

Yes—if you want hands-on, immediate layering of string pads and synth tones in a compact, robust analog unit. No—if you need per-note envelope control, patch recall, or modern integration.

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8:31