Model: MKS7 super quarted
Rackmount: 2 units (only black version, "ivory version" has no rack ears)
Display Type: segment display
Dimensions: 482 x 88 x 400 cm
Weight: 7 kg
Synthesis: Analog subtractive + digital PCM
Multitimbric: 7 parts
Oscillators: 7 DCO + 11 PCM
Polyphony: 7 voices (synth) + 11 PCM
Filters: Lowpass resonant (self-oscillating) at 4 poles + Highpass (not resonant)
LFO: 1 modulator
Envelope: 1 ADSR per voice
Scales : standard
Memory: 100 melody tones sound + 20 bass sound + 1 drum kit (11 sounds)
MIDI: yes + exclusives
Effect: analog chorus based on BBD MN3006, MN3009, MN3101
IC: BA662A (VCA) 80017A (VCA+VCF)
OS: enter test mode pressing "3" while switching ON.
Exists in black version the same, but white (ivory) one cannot be rackmounted.
Just a bunch of controls: master tune (50 cents) , 4 sliders mixer, dynamic slider and 20 buttons. Display is segment numeric
Back panel terminal connectors:
- pitch bender sensitivity knob
- Modulation sensitivity knob
- Bass detune knob
- mix out (with 3 impedances switch)
- separate out for rhythm
- separate out for bass section
- separate out for chord
- Midi Interface
Front panel: just headphones
Have some sounds or demo want to share?
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OSCILLATOR core CPU NEC D7811G-102 manages on 6 DCO ( IC X MC5534A WG waveform generators) from juno106 + 1 slimmed-down + a digital drum kit.
Quite all IC are the same as the famous polysynth including the dreaded 80017A (VCA+ VCF) which is prone to break. See "80017 issue" below.
4 wave sapes:
- square with variable width
- triangle wave
- square sub-oscillator (set to 1 octave lower)
- white noise generator.
internal warm analog chorus based on bucket brigade.
A simple white noise
can be added to the oscillators section.,
2 allocated voices assigned to Midi Channel 1.
4 voices assigned to Midi Channel 3.
NB: Pretty strange, the chord section sounds like those old arrangers!
Monophonic assigned to Midi Channel 2. The bass can be directly detuned by rear pitch knob. The Bass oscillator DCO is slimmed down compared to melody.
11 digital voices PCM assigned to Drum Midi Channel 10, The sounds are partiallyderived from Roland Tr707 cult machine ROM.
Special whole mode Good NEWS! t is possible to assign 6 DCO as a single part, a kind of Juno 106. The procedure is a complicated combi: Press MIDI + Rhythm + Bass+ Chord + Melody. While holding the CHORD button, press the MELODY button.
Classic analog filter based on IC 80017A (also acts as an EG) with 2 modes:
1- Lowpass resonant (self-oscillating) at 4 poles
2- Highpass (not resonant)
Single delayed triangle modulator, relative frequency range from 0.1 to 30 Hz.
1- DCO pitch
2- VCF cutoff
3- DCO pulse width.
1 ADSR (4-segments) EG for both:
- VCA amplitude
- VCF cutoff filter
Note: bass generator (DCO "7") has its own EG.
Like the big brother 106, the MKS70 features the infamous 80017A IC is an enclosure of 3 famous chips the 3109 + 2 X BA662, IC drowned into a kind of resin that after years dilates causing a common IC failure. There are 2 ways to fix it:
Clone replacement: companies produce IC clones (analogue renaissance / Naab ) replacing IC involves soldering and re-calibration
basically you have to soak the IC for some days then the coating should be removed allowing some direct repairs on de-encapsulated IC
100 ROM melody tones sound
20 ROM bass sound
NO RAM sound! sound must be edited from external software (CTRL. org is free)
- 1/kit 11 sounds in ROM: drum, snare drum, low tom, mid tom, hi tom, rim shot, claps, hihat open/close, ride and crash. Cannot be edited.
- edit interface
- no ram memory
- quality build
- Juno and 707 bonanza