KEYBOARD a 44 keys compact keyboard (no velocity) with wooden end panels, 41 pots for tweaking sounds, 6 buttons and 13 small switches. On the left controls for overall portamento and detune, and a switch for transposition (an octave up or down).
->In 2020 Behringe made clone of the mp4, the behringer monopoly
KEY ASSIGN a special feature of the mp4 is the voice assign, a bit different from classic monophonic:
- Unison stacks all 4 VCOs
- Unison / Share assign all voices available
- Poly four voice in polyphonic paraphony, which means mp4 share one common VCA and VCF envelope
- Chord mode, like old Poly-800, allows to record a chord and play with a single note
TERMINAL CONNECTORS:
1-Clock input for arpeggiator (pulses)
2-pedalswitch input for portamento mode
3-VCF cutoff CV input
4-VCO FM CV input
5- gate input switch between +15V and s-trig modes
6-Trigger (gate) input
7-Trigger (gate) out
8-Control voltage pitch input of course MONO (1V/Oct not usual Korg Hz/V)
9-Control voltage pitch output (1V/Oct not usual Korg Hz/V)
10-headphones output
11- main mono output
SOUND subtractive all analog with four VCOs based on SSM 2033 with 3 shapes: triangle, sawtooth and square wave with variable and modulable pulse width + 1 white noise generator circuit. VCO octave range is 16 ', 8', 4 'and 2' , and each oscillator has indivifual volume control and tune pot (about 50 cents).
OSC SYNC One of the most interesting (and unique) features of the Mono/Poly is the sync ("Syncro") and cross-modulation ( "X-Modulation") options between the 4 oscillators. In Syncro and X-mod Single mode, the VCO1 is the master syncing the other 3 VCOs to it . In Double mode, both VCO1 VCO2 are masters, syncing VCO3 to VCO1 and VCO4 to VCO2.
FILTER Punchy 4 slopes resonat Low pass filter based on classic SSM 2044, with key tracking option (150% doesn't work with external CV control)
ENVELOPE: 2 EGs for VCA and VCF type 4 segments ADSR. Different retrig mode for EG (Single and multimode)
LFO main modulator MG1 is assigned to MOD wheel with triangle and sawtooth shapes, 0, 1-20 Hz frequency range, and can modulate VCO pitch, filter VCF and pulse width. A second modulator MG2 (only triangle shape) is simpler.
ARPEGGIATOR: Range: 1 oct, 2 oct or full with UP or DOWN or UP / DOWN direction and LATCH mode
Disclamer:
Polynominal dot com is not associated or affiliated with Korg in any manner.
Pictures from polynominal.com
Brochure from Korg webiste
Korg monopoly
Korg
classic vintage Synthesizer 44 keys from 1981 with 4 powerful VCO
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