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Korg M1R




korg m1R
info Country: Japan
Weight: 6 Kg
Dimensions: 430 (w) x 405 (h) x 88 (d) mm
audio demo trend price : 200€
manual schematic.zip factory patch demo comments

KORG M1R (1988)
Music Workstation


KORG M1 rackmount version of the best-seller digital, workstation keeping same technical characteristics.


korg m1
korg m1r

info RACKMOUNT 2 standard rack units.
Main panel features a 16 x 40 display, 36 buttons and 1 encoder.

Back panel terminal connectors:
- Midi interface
- main signal out
- AUX analog out
- 2 pedal inputs assignable to program change, start-stop, bypass or cutoff

Front panel terminal connectors:
- headphones out
- 2 card slots for expansion

edit TECH cpu NEC-V50 (part of 70216 family) manages 16 voices polyphony based on AI System subtractive synthesis - DAC is a Burr Brown PCM 54HP.


A basic M1/M1R patch is composed by 1 or 2 PCM (single/double) PCM samples with individual settings:

- pitch detune
- stereo panning
- volume gain
- PCM delay start

demo Hear historic universal choir preset

internal 4 Mb ROM contains 149 PCM waveforms at 16 bits resolution.
The wavetable is organized into 3 main categories:

wavetable - 75 PCM acoustic instruments e.g strings, violins, sax, piano
- 44 PCM percussions and chromatic drums
- 30 PCM DWGS* pre-calculated mathematically generated waves e.g additive harmonic, vocal formants andbasic waves like sine, sawtooth or pulse.
* DWGS were originally developed for model Korg DW-8000.

and CARDS standard wavetable can be expanded to EX with further 4 Mb PCM, in this case the rackmount became M1EX (EX upgrade is factory native in successive "T" series).
Even more waveforms can be added using Korg M1 PCM cards or others AI2 compatible Korg systems like Korg M3r or Korg Wavestation. Here's the list of the official cards (card picture from ebay auctions) but there are plenty more from third-part :

Code Title Demo PIC
MSC-01S; MPC-01S Variety   info
MSC-02S;  MPC-02S Synth 1 demo info
MSC-03S;  MPC-03S Drums 1 demo info
MSC-04S;  MPC-04S Orchestra demo info
MSC-05S;  MPC-05S Piano demo info
MSC-06S;  MPC-06S Fretted demo info
MSC-07S; MPC-07S Synth 2 demo info
MSC-08S; MPC-08S Percussion demo info
MSC-09S; MPC-09S Organ demo info
MSC-10S; MPC-10S Ethnic 1 demo
MSC-11S; MPC-11S Brass demo info
MSC-12S; MPC-12S Synth 3 demo info
MSC-13S; MPC-13S Ethnic 2 demo  
MSC-14S; MPC-14S Sound Effects demo info
MSC-15S; MPC-15S Drums 2    
MSC-16S; MPC-16S Environment demo  

organ card organ card

performance PERFORMANCE the M1R is a multitimbric module with special COMBI mode which manages up to 8 parts in the same time with individual parameter settings:

korg m1r spec - Midi channel assign
- volume mix
- semitone transpose
- pitch detune
- zone split
- velocity split
- damper on filter
- aftertouch assignable to pitch modulation, filter and amplitude
- scales one microtonal user-free slot + 4 ROM presets: equal temp 1-2 and pure major-minor.

filter FILTER
section is the VDF - Variable Digital Filter - is a non-resonant lowpass filter with Keytrack function.

vdf demo HEAR filter


adsr ENVELOPE up to 6 EGs:

vdf - VDA amplitude : OSC1 and OSC2 4 segments + 2 times
- VDF filter: OSC1 and OSC2 4 segments + 4 times
- Pitch EG: :OSC1 and OSC2 4 segments + 2 times

demo HEAR slow pad EG

lfo LFO there are 2 delayed and syncable modulators called MG (shapes: triangle, sawtooth up, sawtooth down and square) and 2 destinations:
- MG1: modulates OSC1-OSC2 pitch
- MG2: modulates filter VDF.

vdf demo HEAR LFO modulator

edit SEQUENCER works in both real-time or step notes mode (quantizing up to 1/48 resolution) and manages 8 tracks.


2 sequenced tracks from famous Classic Amiga tro game:

demo HEAR sequenced "shadow of the beast*" p1
demo HEAR sequenced "shadow of the beast" p2

DSP manages double 16-bits sound processors combined in parallel or serial mode.
There are mainly 9 categories effects: reverb, delay, overdrive, equalizer, chorus, leslie, phase shifter, frequency exciter and flanger demo HEAR reverb

limited CC# implementation but the exclusive systems is complete.



RAM: 100 patches
RAM: 100 combi
RAM: 10 songs + 100 patterns 4400 notes (7700 reducing memory balancing between patch- combi).

memroyBattery replacement: internal battery is a 3V lithium CR-2032 with holder, it is quite common and easy to replace.- click for high res picture -

memroy TIP: Sounds can be saved using special MCR03 card.

family EDIT:
there are several editors for M1/M1r :

- Emagic Soundiver (out of business)
- M1LibEd (shareware, old PC) - PIC
- M1 Manager (commercial, PC) - PIC
- Caged m1 (now free, Atari ST)- PIC
- Midiquest (commercial PC/MAC)
m1 eidtor

family Related M1R models:

related family

M1 61 keys keyboard version

M3R a slimmed m1 / m1 version with similar sound but different structure

korg t series T series upgraded to EX memory, some versions can also import samples.
T1 (EX) (88-notes weighted piano keyboard)
T2 (EX) (76-notes keyboard)
T3 (EX) (61-notes keyboard)
Korg M01D

M01D a m1 software for the handheld Cconsole from Nintendo

Also Korg IM1 for Apple IOS





effet VST PLUGIN / SAMPLED VERSION there are some free and commercial samples set:

free m1r samples LORE SAMPLE PACK Kontakt sampleS FREE a gift from polynominal.com Other third-part samples:
- piano samples
-39 drum samples
dexed VST plugin KORG LEGACY collection virtual VST plugin, along with:



original scan original scan
original scan original scan



Company: Korg
Model: M1r
Class: Synth Module
Unit: 2 rack space
Dates: 1988
Display: 16 x 40 dots
Synthesis: PCM rompler
Technology: AI System
ROM size: 4 MB
N.waves: 149 PCM
Resolution: 16 bits
Polyphony: 16 voices
Oscillator: 2 PCM
Multitimbric: 8 parts
Filter: digital low pass
LFO: 2 modulators
Envelope: 3 EGs / osc
Sequencer: 4 tracks

Memory: 100 slots
Midi: IN / OUT / THRU



demo favourite : universe
demo favourite : modern !
demo favourite : retro house
demo favourite : perf fx
demo favourite : sinereverb
demo favourite : precint bass
demo piano: pianobar
demo rhodes: plastic ep
demo organ: hammond b3
demo organ: pipe
demo string: pizzicato
demo brass: disco
demo celeste: plum me
demo celeste: magic stuff
demo bass: analog Sh101
demo bass: tb303
demo choir: relax
demo choir: chords
demo choir: another universe
demo choir: performance
demo synth: mystery
demo synth: high lfo
demo synth: delay pitch
demo synth: sequence filter
demo synth: crystal bell
demo synth: suspence
demo synth: whistle
demo synth: panning
demo synth: digital oldies
demo synth: choir DWGS
demo synth: bells and pads
demo synth: 8 bits
demo synth: vangelis
demo synth: syntbassy
demo pad: also modulation
demo pad: clockwork
demo pad: traditional
demo pad: hyper flanger
demo pad: with modulation
demo FX: flanger + delay k
demo FX: reverb square
demo percussion: anvil





2000 free M1/M1R Sound collection patches

free korg m1r m1 patches


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m1 logo



korg m1r for sale




isnide M1r main board Korg m1r close up


solid solid
Solid as a tank Classic Digital


REVIEW "Compact M1 version.
Classic digital sounds at bargain price."

manual manual
- Classic - limited filter
- PCM are outdated
- bread'n butter - bulky

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all snapshots*, sounds, texts copyright Polynominal.com / Eric Pochesci - polynominal.com is not associated or affiliated with KORG in any manner.

Korg M1R korg M1R Module Music Workstation
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