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The CZ series were a family of low-cost Phase distortion synthesizers produced by Casio mid-1980s. There were eight models of CZ synthesizers released: the CZ-101, CZ-230S, CZ-1000, CZ-2000S, CZ-2600S, CZ-3000, CZ-5000, and the CZ-1. Additionally the home-keyboard model CT-6500 used 48 phase-distortion presets from the CZ line. The CZ series were remarkably flexible synthesizers, and their price made programmable synthesizers affordable enough to be purchased by garage bands. Yamaha soon introduced their own low-cost digital synthesizers, including the DX-21 and DX-100, in light of the success of the CZ series. Users of the CZ series of synthesizer include Vince Clarke, Clarence Jey, They Might Be Giants, Jean Michel Jarre, Seventh Celestia, the Orb, Moby, Jay Metarri, Cirrus, Jimi Tenor, Jimmy Urine and Jimmy Edgar. ==Programming the CZ synthesizers== Casio's Phase-Distortion synthesis technique was championed by Casio engineer Mark Fukuda and evolved from the Cosmo Synth System that was custom-developed for legendary synthesist-composer Isao Tomita. Yukihiro Takahashi was also on board during development,〔http://madtheory.com/site/?p=320〕 he then toured with a CZ-1 in 1986. To make the CZ synthesizers inexpensive, Casio used digital synthesis without a filter instead of traditional analog subtractive synthesis with a filter. Like many early digital synthesizers, its sound was regarded as "thinner" than the sound of an analog synthesizer. However, the CZ line used phase distortion to somewhat simulate an analog filter, it had in total eight different waveforms: as well as the standard sawtooth, square, and pulse waveforms, it had a special double sine waveform, a half-sine waveform, and three waveforms with simulated filter resonance: resonant sawtooth, triangle, and trapezoidal waveforms. The simulated filter resonance was not considered to sound much like real filter resonance, being a simple waveform at the filter cutoff value instead of a real filter resonating. Each digital oscillator could have one or two waveforms. Unlike other synthesizers, where having multiple waveforms caused those multiple waveforms to be mixed together (parallel), the CZ synthesizers would play one waveform and then play the other, and so on in alternation (series). This could cause the appearance of a sub-harmonic one octave below the nominal pitch of the sound, due to the period of the combined waveform taking twice as long as a single waveform would. It was possible to combine two non-resonant waveforms together, and to combine a resonant waveform with a non-resonant waveform, but it was not possible to combine two resonant waveforms. 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Casio CZ synthesizers」の詳細全文を読む スポンサード リンク
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