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Elka Ek-22

Polyphonic Synthesizer (1986) 

Elka Ek-22

Not-so-common five-octave velocity polysynthesizer with 2 DCO,often  called the "Italian Matrix 6

 Main Data 

Elka EK22 made in Italy



Company: Elka
Model: Ek-22
Class: Synth
Keyboard: 61 keys
Dates: 1986
Country: Italy
Weight: / Kg
Dimensions: / mm

Display: LCD 32 chars
Synthesis: analog subtractive
Polyphony: 6 voices
Multitimbric: 1 part
Scales: 3 presets
Oscillator: 2 DCO/ v
Waveform: saw / pulse 
Noise generator: 2 modes
Filter: Low pass analog
LFO: 1 modulator
Envelope: 2 EGs
Effect: chorus
Memory: 64 rom + 32 RAM
Midi: IN / OUT / THRU
IC: CEM3396

Synthesizer 61 keys with LCD (16 x 2 not backlit) pitch bender modulation.
Main panel features 38 buttons, 2 sliders and a single slider pot for data-entry: forget real-time knobs bonanza.

Back panel terminal connectors:
- Main signal out stereo (with 3 level gain switch)
- heaphones out
- Midi IN / OUT / THRU
- cartridge slot for RAM and ROM data
- 4 pedal inputs for damper, sustain, portamento, patch +1  (models VP10 + mp7)

none

- No official VST plugin
- no known samples library

Have some Ek22 sample set you want to share? CONTRIBUTE :) 

owner's manual download


service manual download

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 In details 

Ek22 CPU

 VOICE Cpu 8-Bit Microcomputers TMS 7001 + Motorola 68b09 handle 6 voices polyphony, and each voices features 2 detunable DCO (called "DCG") oscillators with A/B level mix and pitch hardsync mode.

Voices are mainly based on 6 X Curtis CEM3396 Microprocessor Controllable: Wave-Shaper oscillator (2 per voice) with filter VCF, and VCA

CEM3396

 The CEM 3396 is itended to be driven from digitally generated square or pulse timing signals, the device includes two independent waveform converters, a mixer for voltage controlling the relative balance between the two waveform converter outputs, a dedicated four-pole low-pass voltage controlled filter with voltage controlled, a VCA for allowing one converter output to frequency modulate the filter, and two high quality output VCAs, one for envelope control and the other for dynamics and modulation effects.

OSCILLATOR   
DCO 1 (octaves : 16' 8' 4' 2') can be a mix of 2 summale waveforms called "A" and "B"

- A: pulse wave with 32 quantisized width (up to square)
- B: one wave between: sawtooth, sawtooth reverse, triangle and half triangle

NOTE: DCO2 is similar to DCO but OSC can be set also to 2 different noise (white and "coloured")

waves

 EK-22 PERFORMANCE features:

- Split functions  
- special standard and 2 arabic scales  
- monophonic mode  
- portamento amount

LFO / EG / FILTER

Filter

FILTER 

analog low pass with emphasis resonance and special key follow mode. Still based on CEM 3386

LFo

LFO

1 single modulator (shapes: sinewave, sawtooth, square and random) with variable depth (99 scaled levels) and 4 main destinations:
- LFO to pitch (DCO1 / DCO2)
- LFO to filter VCF
- LFO to VCA
- LFO to pulse width (PWM) 

Envelope

Envelope

2 bipolar EGs each with 5 segments + 1 time EG to DCO1, DCO2 , DCO1-2, VCF and VCA

Analog chorus board

EFFECT: analog CHORUS with 2 level depth based on mn3009 + driver 3101.

Same warm breeze found e.g on Roland Alpha Juno polysynth.

MEMORY:
- 64 ROM presets
- 32 RAM slots

 Battery backup replacement, click to zoom -->


Elka EK22 battery replacement

Our Verdict 

" A strange matrix-like sound! can still be found at bargain price, give it a try for old mellow warm sounds! " 

Sound 
quality

Interface

Build
 quality

Rarity

Quality / 
price

Overall

CONS

- edit interface
- bulky

PROS

- cheap now
- analog 
- rare

Are you an EK22 user? do you like it? You do not agree with our review?  Let us know in the comment field just below 

DISQUS COMMENTS WILL BE SHOWN ONLY WHEN YOUR SITE IS ONLINE

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elka ek22 ELKA EK22
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