Casio's SD Synthesizers were a late-1980s line of analog synthesizers featuring a resonant filter. SD synthesis was traditional DCO-analog synthesis, with the main difference being that some of the SD
The CZ series is a line of low-cost phase distortion synthesizers produced by Casio beginning in 1984. Eight models of CZ synthesizers were released: the CZ-101, CZ-230S, CZ-1000, CZ-2000S, CZ-2600S,
Casio CZ-1
Parameter panel on Casio CZ-1. Two set of parameters on panels are used on 'tone mix' and 'key split' modes.