TECH cpu NEC-V50 (part of 70216 family) manages 16 voices polyphony based on AI System subtractive synthesis; relative DAC is a Burr Brown PCM 54HP.
a basic patch is composed by 1 or 2 PCM (single/double) PCM samples with individual settings:
- pitch detune
WAVETABLE 4 Mb ROM contains 149 PCM waveforms at 16 bits resolution organized in 3 categories:
- 75 PCM acoustic: acoustic instruments including strings, violins, sax and piano
- 44 PCM drum: percussions and chromatic
- 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 for previous model Korg DW-8000.
EX UPGRADE 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, but there are plenty more from third-part :
||Drums 1 FOR SALE!
||Fretted Instruments FOR SALE!
PERFORMANCE the COMBI mode manages up to 8 parts in the same time with individual parameter settings:
- volume mix
- 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 section is the VDF Variable Digital Filter is a non-resonant lowpass filter with Keytrack function.
ENVELOPE up to 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 there are 2 delayed and syncable modulators called MG (shapes: triangle, saw up, saw down and square)
MG1: modulates OSC1-OSC2 pitch
MG2: modulates filter VDF.
SEQUENCER works in both real-time or step notes mode (quantizing up to 1/48 resolution) and manages 8 tracks.
MIDI limited CC# implementation but the exclusive systems are complete.
EFFECT 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.
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.
EDIT: there are several editors for M1/M1r :
Emagic Soundiver (out of business)
- M1LibEd (shareware, old PC)
- M1 Manager (commercial, PC)
Caged m1 (now free, Atari ST)- PIC
Midiquest (commercial PC/MAC) PIC below
Related M1R models:
M1 61 keys keyboard version
M3R a slimmed m1 / m1 version with similar sound but different structure
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)
M01D a m1 software for the handheld console from Nintendo. VIDEO
Also Korg IM1 for Apple IOS VIDEO
VST PLUGIN / SAMPLED VERSION there are some free and commercial samples set:
AUDIO DEMO (no external PCM cards, no effects)