Siel Expander EK 600 Programmable Polyphonic Synthesizer

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The Siel Expander EK 600 Polyphonic Synthesiser has the same sound generation as the Opera 6 v3, Kiwi and DK 600 models: 6 voices with 2 DCO's per voice, 3 LFO's, a SSM semiconductor based filter with resonance and an ADSR to control it. The VCA has an envelope assigned to it. The synth offers 95 programs in it's memory. It is MIDI capable and needs to be programmed from a DK-600, an Opera 6 or a midi editor.