Elektor polyphonic synthesiser

The Elektor polyphonic synthesizer was a design published in Elektor magazine from October 1981 to July/August 1982, based on Curtis ICs. It uses a Z80-A CPU to scan the keyboard and to store preset sounds. It can have up to ten of the same VCO, combined VCF/VCA and dual ADSR modules as used for the Elektor new synthesiser. The design of a compatible digital oscillator was published in June 1985.