The M1 is world's top selling with even more units sold than Roland D-50 or Yamaha DX-7
M1 represents most of the nineties music from world to dance.
KEYBOARD (weight: 13 Kg) 61 velocity keys with aftertouch.
The frontal panel features a 16 X 40 display, 33 push buttons and 1 data slider.
On the left side a single joystick for pitchbending and Sweep Filter modulation control.
Back panel terminal connectors:
PCM card slot
- Midi interface
1 damper pedal input
- 2 pedal inputs assignable to program change, start-stop, bypass or cutoff
VOICES cpu is a NEC-V50 manages 16 voices based on 16 bit AI System subtractive synthesis.
basic patch is composed by 1 or 2 PCM samples with individual settings:
variable start offset
WAVETABLE is 4 Mb ROM and holds 149 waveforms 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 on previous model DW-8000.
EX UPGRADE standard wavetable can be expanded to EX with further 4 Mb PCM.
Even more waveforms can be added using Korg M1 PCM cards or others AI2 systems like Wavestation. INFO: EX upgrade is factory native in successive T series.
PERFORMANCE the COMBI mode manages up to 8 patches in the same time with individual parameter settings:
- Aftertouch assignable to Cutoff / EG AMP / LFO pitch/ or LFO filter
- volume mix
- zone split
- velocity split
- damper on filter
FILTER section is the VDF Variable Digital Filter is a non-resonant lowpass filter with Keytrack function.
ENVELOPE there are 6 EG in total:
- 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 modulators MG:
MG1: modulates OSC1-OSC2 pitch
MG2: modulates filter VDF
Both LFO features 4 waveforms: triangle, saw up, saw down and square.
Some extra modulations parameters include delay-start, modulation synch and variable depth.
EFFECT the M1 DSP manages 2 different 16-bits sound processors combined in parallel or serial mode. There are mainly 9 effect categories:
- rotary speaker
- phase shifter
- frequency exciter
MIDI limited CC# implementation but the exclusive systems are complete. TIP: the MINDSCOPE function is a neat too for incoming events monitoring.
SEQUENCER works in both real-time or step notes mode (quantizing up to 1/48 resolution) and manages 8 tracks.
SCALES one microtonal user-free slot + 4 ROM presets:
equal temp 1-2
MEMORY holds :
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.
TIP: internal battery is a CR2032 with holder, it is quite common and easy to replace.
EDIT: there are several editors for m1 like Soundiver, Midiquest or older Caged m1 for Atari St.
Related M1R models:
KORG M1R: expander version
KORG T1 (EX) (88-note weighted piano keyboard)
KORG T2 (EX) (76-note keyboard)
KORG T3 (EX) (61-note keyboard)
PLUGIN VERSION korg relesed the Legacy M1 software synthesizer including 2700 sounds and all cards PCM