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Korg M1R




korg m1R
  audio demo trend price : 150-200€
manual schematic.zip factory patch demo video comments

KORG M1R (1988)
Music Workstation


Rackmount version of the best-seller workstation KORG M1 keeping quite same characteristics.

korg m1

music workstation

info RACKMOUNT (weight: 6 kg) 2 units.
Nain panel features a 16 x 40 display, 36 buttons and 1 encoder.

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

Front panel terminal connectors:
- headphones
- 2 card slots



edit VOICES cpu NEC-V50 (part of 70216 family) manages 16 voices polyphony based on 16 bit AI System subtractive synthesis - M1r DAC is a Burr Brown PCM 54HP.

A basic patch is composed by 1 or 2 PCM (single/double) samples with individual settings:
- detune
- stereo panning
- volume
- delay start

NEC V50 diagram

4 Mb ROM contains 149 waveforms organized in 3 categories:
A- 75 PCM acoustic: acoustic instruments including strings, violins, sax and piano
B- 44 PCM drum: percussions and chromatic
C- 30 PCM DWGS: pre-calculated mathematically generated waves like additive harmonic, vocal formants and traditional basic waves like sine, saw or pulse.
TECH: DWGS were originally developed on previous model Korg DW-8000.


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, but there are plenty more from third-part :

organ card

organ card m1 cards fretted instruments ethnic1 brass card ethnic2 synth1 demo synth2 synth card3 organ card piano card orchestra card sound effects environment card percussion drums 1

MSC-01S; MPC-01S Variety
MSC-02S;  MPC-02S Synth 1 FOR SALE!
MSC-03S;  MPC-03S Drums 1 FOR SALE!
MSC-04S;  MPC-04S Orchestra FOR SALE!
MSC-05S;  MPC-05S Piano
MSC-06S;  MPC-06S Fretted Instruments FOR SALE!
MSC-07S; MPC-07S Synth 2
MSC-08S; MPC-08S Percussion FOR SALE!
MSC-09S; MPC-09S Organ
MSC-10S; MPC-10S Ethnic 1
MSC-11S; MPC-11S Brass FOR SALE!
MSC-12S; MPC-12S Synth 3
MSC-13S; MPC-13S Ethnic 2 FOR SALE!
MSC-14S; MPC-14S Sound Effects
MSC-15S; MPC-15S Drums 2
MSC-16S; MPC-16S Environment

performance PERFORMANCE the COMBI mode manages up to 8 patches in the same time with individual parameter settings:
- aftertouch assignable to pitch modulation, filter and amplitude
- Midi channel
- volume mix
- transpose
- detune
- zone split
- velocity split
- damper on filter

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



adsr ENVELOPE 6 EGs:
- 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

lfo LFO
there are 2 delayed and syncable modulators MG:
1- MG1: modulates OSC1-OSC2 pitch
2- MG2: modulates filter VDF
Both LFO features 4 shapes: triangle, saw up, saw down and square.

DSP manages 2 X 16-bits sound processors combined in parallel or serial mode.
There are mainly 9 categories effects:

reverb delay overdrive
equalizer chorus rotary speaker
phase shifter frequency exciter flanger

memroy MIDI limited CC# implementation but the exclusive systems are complete.
TIP: the MINDSCOPE function is a neat too for incoming events monitoring.

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

scales SCALES one microtonal user-free slot + 4 ROM presets:
- equal temp 1-2
- pure major-minor


memroyMEMORY :
RAM: 100 patches
RAM: 100 combi
RAM: 10 songs + 100 patterns 4400 notes (7700 reducing memory balancing between patch- combi).
Sounds can be saved using special MCR03 card.

Battery replacement: internal battery is a 3V lithium CR-2032 with holder, it is quite common and easy to replace.

internal m1r

family EDIT: there are several editors for M1/M1r :
- Emagic Soundiver (out of business)
- Midiquest (commercial PC/MAC)
- M1LibEd (shareware, old PC) - SCREENSHOT
- M1 Manager (commercial, PC) - SCREENSHOT
- Caged m1 (now free, Atari ST)- SCREENSHOT

korg m1 editor



family Related M1R models:

related family

Korg M1 61 keys keyboard version

korg t series

KORG T series upgraded to EX memory, some versions can also import samples. VIDEO

KORG T1 (EX) (88-notes weighted piano keyboard)
KORG T2 (EX) (76-notes keyboard)
KORG T3 (EX) (61-notes keyboard)

korg m3r Korg M3R a slimmed m1 / m1 version with similar sound but different structure
Korg M01D

Korg M01D a m1 software for the handheld console from Nintendo. VIDEO

Also Korg IM1 for Apple IOS VIDEO



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

  name price link demo
dexed VST plugin KORG LEGACY

collection virtual VST plugin, along with:

$$ Commercial
free sample pack failed muso Free
piano samples
effet n/a
free m1 drum kit Hardballs Records free
39 drum samples
free drum set n/a
free m1 drum kit Hollow sun Commercial sample set


korg 01W set
effet n/a
M1 for KROME M1 for KROME FREE sound set for KORG KROME effet M1 for KROME
free m1r samples FREE "LORE" Kontakt sample FREE
a gift from US
korg m3r free sample N/A

demoAUDIO DEMO (no external PCM cards, no effects)

demo m1 factory songs
demo M1 universe
demo different universe choir
demo string pad
demo klunky m1 piano
demo klunky rhodes too
demo hammond b3
demo almost modern EDM
demo carpenter bass
demo mandolin pad?
demo nasty LFO
demo guess it: another choir
demo flangerized
demo mmm Vangelis?
demo bright attack
demo the thrill
demo bass and melody
demo house organ retro'
demo bassline sh
demo detuned combi
demo flute + piano
demo square lovers
demo lonely square
demo sugar plum
demo metal twist
demo reverb
demo space lounge
demo VDF
demo FX: sad man
demo FX: falling skies
demo FX: asteroids hits
demo Amiga shadow of the beast (all m1)
demo Amiga shadow of the beast p2 (all m1)

effet Soundcloud M1r

demo1 demo m1  


m1r ATARI Notator with Korg M1R Korg M1 Workstation
demo with ATARI Notator Shadow of the beast M1 mix

rackmount m1r
















korg m1r factory reset

Just load the factory card MPC00P or EX. There is no ROM recall








To know your M1r version just hold INT while turning on the module. The os is the number after the "#"


original scan




original scan



original scan


original scan




buy m1 memorry cards




korg m1r for sale




isnide M1r main board Korg m1r close up


- Classic
- bread'n butter
- today bargain price


- limited filter
- some PCM
are outdated


Review: "Compact M1 version.
today some sounds may be a bit outdated, but still an interesting module: some character and dynamics in the mix. "

korg m1r logo



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all snapshots*, sounds, texts copyright Polynominal.com / Eric Pochesci

korg m1r 4 out of 5 based on 33 ratings. price €150