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Korg EX-8000

 

 

 

korg ex8000

info Country: Japan
Weight: 8 Kg
Dimensions: 430 (w) x 412 (h) x 90 (d) mm
audio demo trend price : 300€
manual schematic demo video comments
Korg EX-8000
Programmable Polyphonic Synthe Module (1986)

 

Rackmount version of the famous hybrid synthesizer DW-8000 features internal digital waveforms and an analog filter.

programmable polyphonic module
main

info RACKMOUNT MODULE 2 unit height.
The main panel features a segments display, 3 knobs, 19 buttons, 1 data encoder and 3 switch tabs.

Rear panel terminal connectors:
- Midi Interface
- main out high/low impedance set

Front panel terminal connectors:
- headphones
- tape Interface.

 


edit TECH main core 8-bits HD63b03X manages 8 voices polyphony based on DWGS Digital Waveform Generator System subtractive synthesis.

STRUCTURE each voice is composed by 2 oscillators DCO + 1 white noise circuit with variable parameters:
- volume gain
- octave set 16' / 8' / 4'
- pitch detune.

 

DWGS

 

edit WAVETABLE the 256 kb ROM (4X EPROMS) contains 16 short-cycled spectral 8-bits PCM waveforms: sawtooth, square, piano, electric piano (x2), clavinet, organ, brass, sax, violin, guitar, electric guitar, bass, digital bass, bell and whistle.
TECH: It seems to be possible to hack the internal EPROMS to change the waves.


dwgs wavea


dwgs
(upper) DWGS number 6 on tube-vacuum oscilloscope



multitimbral PERFORMANCE the system handles voices in various playmodes:
- poly1 rotate sequentially the 8 voices in constant order
- poly2 same as poly1 but restarts from first voice
- unison1 retriggers the EG when a key is pressed
- unison2 only the first key activates the EG
- aftertouch be assigned to filter, amplitude or LFO depth
- joystick can be assigned to pitch, LFO frequency and VCF cutoff
- interval transposes the OSC2 pitch to keep a constant interval above first OSC values: minor 3rd, major 3rd, perfect 4th, perfect 5th and unison.



filter FILTER
based on analog 8 X NJM2069 (same found on Korg Poly-800 which is paraphonic)
Lowpass resonant VCF at -24 dB/Oct and polarity inversion.
Section features a primitive Keytrack system and 4 fixed rates: 0 / 25 / 50 / 100 %.


cutoff



Eg LFO
a single delayed modulator MG (shapes: triangle, square saw-up and saw-down) and 2 destinations:
- OSC 1 & 2 pitches (not individual)
- VCF cutoff.

 

lfo

 


Eg ENVELOPE
3 EGs:
- EG1 VCA: 4 segments + 2 times (ADBSSR)
- EG2 VCF: 4 segments + 2 times with polarity inversion
- autoBend: simple pitch EG (OSC1 / OSC2 or both) 2 modes up / down.


eg vcf




FX EFFECT
12 bits digital delay with 2 - 512 ms time range able to generate short delays and chorus.
Time can be set in coarse of fine mode as well as total feedback.



mrmory MEMORY:
- 64 slots in RAM patches.
Sounds library can be saved to either Midi sysex dump or magnetic tape. System works with a 3V CR-2032 soldered to the mainboard, you have to disassamble the whole keyboard and remove board KLM-661-3.



arpeggiator UPGRADE third-part companies projected some hardware boards that adds some new functions like split, key transpose, random LFO and more.


related family


 


mrmory
EDITORS there are some free and commercial editors for DW8000:
- Soundquest (MAC/PC $$)
- ctrlr (PC LINUX)
- DW8000 Patch Editor (old PC OS free)


dw8000 editor

 

 

mrmory EX-8000 RELATED MODELS:


related models

DW-6000 61 keys keyboard version Slimmed-down version with less waveforms and some minor differences

korg dss1 DSS1- this is a sampler but with very similar architecture and hardware
korg dw8000

DW8000 64 keys keyboard version with arpeggiator+joystick control, same as this rackmount

korg mex8000 MEX-8000 memory expansion adds 4 extra banks.
korg dvp1 DVP1 vocoder not directly related, but they do features a very very similar case.


 

effet VST PLUGIN / SAMPLED VERSION there are some free and commercial samples set, NO OFFICIAL PLUGIN EMULATOR:

  name price demo
Waveshapper FREE
DW8000 sample pack
n/a
PPG 3 V

SQ8L Emulation of Ensoniq SQ80

Cobalt VST Emulation of DW but also Kawai K3 and Ensoniq ESQ1

FREE
No longer available
video


 

demo AUDIO DEMO

demo song 100% DW8000
demo resonant pad
demo squared bass
demo delayed pad
demo fat sirens
demo random autobend
demo drone
demo klunky piano
demo chording
demo bass-organ
demo pad lfo to vcf
demo filtered organ
demo TEST: delay
demo TEST: arpeggiator
demo TEST: cutoff + resonance
demo TEST: LFO frequency

 

 

videoVIDEO SELECTION

Korg EX-8000 Demo Korg EX-8000 + Roland JD-800 + TR-707 korg ex-8000 + mfb-522
Demo
+ Roland JD-800
+ TR-707
with mfb-522

 



Company: Korg
Model: EX-8000
Class: Synth Module
Dates: 1986
Price: 300€
Synthesis: hybrid
Polyphony: 8 voices
Oscillator: 2 DCO
N. waves: 16 PCM
Resolution: 8 bits
Filter: analog low pass
LFO: 1

Envelope: 3 EGS
Effect: digital delay
Memory: 64 slots
Demo: 20

 

manual
MANUAL

 

manual
SERVICE MANUAL

 

manual
FACTORY PATCH SET DOWNLOAD

 

side

 

 

original scan
mrmory original advert

 

original scan
mrmory original advert

 

 

side

 

Korg EX-8000 FOR SALE

Korg EX-8000 FOR SALE
CHECK OUT EBAY OFFERS

 

side

 

 

 

inside filter noise
awardSPECIAL AWARD:
solid
solid
HYBRID FREAK NERVOUS EDIT


comment

REVIEW "A good unit! even better than DW-8000 which keyboard was low quality. Good filter, sound is always a bit dark but pleasant. Too bad edit is limited. A near-classic."

manual manual
-analog filter and VCA -edit interface
-unison voices
-some DWGA waveforms



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Korg ex8000 4 out of 5 based on 58 ratings. price €250