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Korg Prologue - Polyphonic Analog Synthesizer (16-Voice)

Korg Prologue - Polyphonic Analog Synthesizer (16-Voice)
Key Features
  • 16-Voice - Fully Programmable
  • 61-Key Natural Touch Keyboard
  • 500 Fully Editable Presets
  • Modes: Poly, Mono, Chord, Unison
The 16-voice Korg Prologue is the flagship polyphonic analog synthesizer that builds upon the success of the Minilogue and Monologue synthesizers, combining multi-voice, multi-timbre, and Multi-Engine technology to create a professional-quality instrument that's capable of satiating the most advanced user, but with an interface that a novice will find inviting.
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Korg Prologue Overview

  • 1Description
  • 2General Features
  • 3Multi-Engine
  • 4Voice Modes
  • 5Effects
  • 6Program Sort
  • 7Bi-Timbral
  • 8Arpeggiator
  • 9User Customization

The 16-voice Korg Prologue is the flagship polyphonic analog synthesizer that builds upon the success of the Minilogue and Monologue synthesizers, combining multi-voice, multi-timbre, and Multi-Engine technology to create a professional-quality instrument that's capable of satiating the most advanced user, but with an interface that a novice will find inviting.

The synthesizer's architecture uses two VCOs + Multi-Engine (VCO3), a 12 db/per octave filter, two envelopes, a VCA, and an LFO. The Multi-Engine is equipped with three sound generation devices including a noise generator, a variable phase modulation (VMP/FM) generator, and a user oscillator, which allows you to load your own oscillator programs via a free and soon-to-be-released editor/librarian. The two-pole, low-pass filter with enhanced sharpness adds drive with powerful distortion, as well as a low-cut (high-pass) switch. Its sound covers almost every sonic possibility: fat basses, powerful leads, and the lush pads that you expect from a polyphonic synthesizer.

Additional features include four voice modes, a powerful arpeggiator, and a 24-bit digital effects engine, which provides two effect slots (a modulation effect and delay/reverb). Choose between a wide variety of effects such as chorus or ensemble, warm tape delay, or diverse reverbs. The keyboard is a high-quality, Japanese-made, Natural Touch keyboard, providing the same professional-quality touch and feel as on KORG’s high-end workstations. The instrument's enclosure is constructed from a black aluminum front panel with oak wood sides, and high-quality metal knobs. The Korg prologue ships with an IEC power cord.

General Features

  • 16-voice analog synthesizer circuit
  • 61-note, Japanese-made, high-quality, Natural Touch keyboard
  • Multi-Engine Equipped with 3-Types: Noise, VPM, and user
  • High-quality digital effects
  • Open source software that can be customized by the user
  • Low-frequency compression analog effect
  • Bi-timbre support
  • Voice modes that allow voices to be flexibly recombined
  • Arpeggiator equipped with a variety of types and range settings
  • Program Sort allows rapid access to 500 programs
  • Oscilloscope function shows the waveform visually
  • Tough and stylish body made of aluminum and wood
  • Sync with another groove machine to enjoy jam sessions


  • The Multi-Engine is provided as VCO3, adding digital waveforms and FM via three different sound engines, which can be combined with the analog VCOs to expand prologue’s sonic potential far beyond that of a traditional analog synthesizer
    • Noise Generator: Four types of noise generators create percussive sounds or sound effects. Experience how digital filtering can produce direct changes in the color of the noise
    • VPM Oscillator: The VPM (Variable Phase Modulation) / FM oscillator offers a metallic and sharp sound with complex overtones that could never be obtained by analog means. With 16 types of oscillator and the Shape knob, you’ll be intuitively guided through complex sound design
    • User Oscillator: Load oscillator programs of your own creation. Sixteen slots are provided, and one type of morphing wavetable oscillator is built-in as a preset

Voice Modes

  • Four Voice Modes
    • Poly: Operates as a poly synth with up to 16 voices. Turn the Voice Mode Depth knob to switch to Duo mode, in which the instrument operates in unison as a poly synth with up to 8 voices
    • Mono: Operates as a mono synth with sub oscillator
    • Unison: Operates as an all-unison mono synth
    • Chord: Plays chords


  • Digital Effects: High-quality digital effects feature 24-bit floating-point processing, and add a further polish to the sound of the prologue. With two effect units provided (a modulation effect and delay/reverb), you can choose from a wide variety such as chorus or ensemble, warm tape delay, or diverse reverbs. The user effect slots let you load effect programs of your own creation
  • Analog Comp/Booster: The VU meter indicates the master effect Low Frequency Compressor (L.F. Comp.) It's a low-end booster/compressor using an analog circuit, delivering a solid sense of presence that cannot be obtained from a simple EQ. You'll particularly notice the difference in high-volume stage performances where maximum dynamics can be utilized

Program Sort

  • The program sort function lets you instantly change the sorting order of the 500 programs
    • Eight Program Sort Methods
      • Prog Num: Sort by program number
      • Category: Sort by program category
      • Alphabetical: Sort programs alphabetically
      • Like: Sort by programs that you “liked”
      • Frequent: Sort by how frequently you used the program
      • Envelope: Sort by envelope shape
      • Random: Sort randomly
      • Live Set: Sort programs registered in a live set


  • The prologue is a two-timbre synthesizer that lets you play two different programs simultaneously. In addition to layer and split, you can use crossfade to smoothly transition between the main timbre and sub timbre


  • The powerful arpeggiator opens a world of limitless inspiration. It provides a four-octave range, and six arpeggiator types. From phrases that could not be performed on a keyboard to sequence-like sound designs, the arpeggiator can play a versatile array of roles
    • Types:
      • Manual
      • Rise
      • Fall
      • Rise Fall
      • Random
      • Poly Random

User Customization

  • Open source means that the prologue’s development is ongoing. It provides 16 user oscillator slots and 16 user effect slots, and you can use the "soon-to-be-released" dedicated librarian software to create your very own oscillators and effect programs, and load them into prologue

Korg Prologue Specs

Keyboard61 keys (Natural Touch keyboard with velocity)
Sound GenerationAnalog sound generator + multi-digital sound generator (noise, VPM, user)
ProgramsOver 500 voices (more than 200 preload, 300 user programs)
Each program provides a program sort function that includes voice mode and timbre settings, and allows up to 8×4 banks of live set programs to be registered
Program Sort: 8 (Prog Number, Category, Alphabetical, Like, Frequent, Envelope, Random, Live Set)
VoicesVoice Mode: 4 (Poly, Mono, Unison, Chord)
The voice mode depth setting allows different parameters to be varied for each mode
Multi TimbralTimbres: Max two timbre (main timbre, sub timbre)
Layer, crossfade, and split settings are possible
Arpeggiator6 types (manual, rise, fall, rise fall, random, poly random)
Tempo and note range can be changed
Synthesizer StructureVCO1: Wave (Saw, Triangle, Square), Octave, Pitch, Shape
VCO2: Wave (Saw, Triangle, Square), Octave, Pitch, Shape
Modulation: Pitch EG (All, VCO1+2, VCO2), Pitch EG Int, Sync, Ring, Cross Mod Depth
Multi-Engine: Noise/VPM/User, Octave, Type, Shape
Multi-Engine Types:
Noise Generator: 4 types
VPM Oscillator: 16 types
User Oscillator: 16 slots
Mixer: VCO1, VCO2, Multi
VCF: Cutoff, Resonance, EG INT, Drive, Low Cut, Keytrack
AMP EG: Attack, Decay, Sustain, Release
EG: Attack, Decay, Sustain, Release
LFO: Wave(Saw, Triangle, Square), MOD (Fast, Slow, BPM), Rate, Int, Target (Pitch, Shape, Cutoff)
EffectsMod Effects: Off/On/Select (Chorus, Ensemble, Phaser, Flanger, User), Speed, Depth
Mod Effects Types
Chorus: 8 types
Ensemble: 3 types
Phaser: 8 types
Flanger: 8 types
User: 16 types

Delay/Reverb: Off/Delay/Reverb, Time, Depth
Delay/Reverb Types
Delay: 8 types
Reverb: 8 types

Low Frequency Compression: Off/On, Gain
ControlsWheels: Pitch wheel
Modulation wheel (can modify different parameters for each program)
Knobs: Portamento knob, Voice Spread knob
DisplayMain: Real-time OLED oscilloscope provides visual feedback of parameter changes
Multi-Engine Section: 7-segment x 6-digit LED display
Inputs and OutputsAudio:
Stereo Headphone: 1/4" / 6.35 mm TRS
Output (Left/Mono, Right) 2 x 1/4" / 6.35 mm TS
Sync In: 1/8" / 3.5 mm (maximum input level 20 V)
Sync Out: 1/8" / 3.5 mm (output level 5 V)
MIDI: MIDI in, MIDI out (5-pin DIN)
USB: Type-B
Expression & Damper: 1/4" / 6.35 mm (half damper is not supported)
PowerPower Supply: AC power supply terminal (IEC connector)
Power Consumption: 38 W
Dimensions34.4 x 13.7 x 4.7" / 874.0 x 348.0 x 118.1 mm
Weight20.6 lb / 9.3 kg
Packaging Info
Package Weight25.55 lb
Box Dimensions (LxWxH)40 x 18.5 x 9"

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