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Elka Synthex

Synthex (image courtesy of

Released: 1981

MSRP: 2500


A versatile synth, similar to a Roland Jupiter 6. Architecture Class: Conventional (subtractive).

Ebay Description:

The Elka Synthex is a 61 key, 8 voice, duo-timbral digital/analog hybrid synthesizer, featuring dual oscillators (with sync and ring mod), resonant low, band, or high pass (CEM) filter, dedicated filter and amplifier envelopes, dual LFOs, 4 track step/realtime sequencer, chorus, glide, and 80 program memories (40 preset, 40 user editable).


Form Factor Dimensions Weight Audio Input Audio Output Communication Port Control Input Control Output Switch Input Power
61 keys ? 26.5lbs no upper lower tape filter sequencer-sync sequencer-sync glide program-increment sustain release AC


Compatibility Multitimbral Memory Program Memory External Storage External Programming UI Input UI Output
- N/A preset:40 user:40 tape no buttons/knobs LED


Multitimbral Polyphony Unison Architecture
split 8 no DCO1+DCO2->VCF->VCA


Effects Pan Modulator Volume Modulator Headphone
chorus (3) no LFO1 VCA-EG no


Arpeggiator Arpeggiator External Sequencer Sequencer Memory Sequencer External Continuous Program Change
no N/A 4 track step or real time monophonic (1 voice/track) 128 notes/track sync joy-stick filter-pedal pedal


Key Pressure Chord Memory External Control External Sustain Key Scaling Velocity Curves
no no no pedal 1 no


Name Signal Class Waveform Octave Range Amplitude Modulator Harmonics Modulator Pitch Modulator Wave Assign Modulator
Osc1 digital pulse saw square triangle 16' 8' 4' 2' 1' no PWM:LFO1/VCO2 ring glide joy-stick LFO1 LFO2 portamento no
Osc2 digital pulse saw square triangle 16' 8' 4' 2' 1' no PWM:LFO1/VCO1 ring sync glide joy-stick LFO1 LFO2 portamento no
Noise analog white-noise pink-noise (mix) - no no no no


Name Signal Class IC Resonant Shape Frequency Modulator Resonance Modulator Shape Modulator
VCF analog CEM3320 yes 24dB low pass 6dB band pass 12dB band pass 12dB high pass VCF-EG key LFO1 LFO2 pedal no no


Name Level Rate Loop Polarity Trigger Level Modulator Rate Modulator
VCF-EG sustain attack decay release no yes key no no
VCA-EG sustain attack decay release no no key no no


Name Waveform Delay Polarity Sync Delay Modulator Level Modulator Rate Modulator
LFO1 square up-saw down-saw triangle yes no no no no no
LFO2 triangle? no no no no joy-stick no
Conventional Models
Synthex EK22 EM22