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The Yamaha YS200 is an FM synthesiser and workstation produced by Yamaha, introduced in 1988. It combines a sequencer, rhythm machine, a FM synthesis soundchip and a MIDI keyboard. It was called the EOS YS200 in Japan and was also released as a more home-oriented keyboard in the form of the Yamaha EOS B200, which also featured built-in stereo speakers. The YS200 is the keyboard equivalent of the Yamaha TQ5 module. The forerunner of the YS200 was the almost-identical Yamaha YS100. ==The sound module== The phase modulation (marked as frequency modulation synthesis) synthesis provided by the YS/TQ sound engine is very similar to many other 4-op synths released by Yamaha during the 1980s. The YS/TQ is nearly fully compatible - aside from lacking portamento - with voices and sysex for the earlier DX11, DX21, DX27, DX100, and TX81Z. The synthesis unit has an 8-note polyphony and 8-instrument multitimbral capability. The synthesis itself is based on 4 operators (each being an oscillator plus an envelope generator), which could be chained in various combinations by selecting one of the 8 available algorithms. Each operator can generate one of 8 selectable waveforms. Additionally, in each of the algorithms, operator 4 can be set to modulate itself with a configurable amount of feedback. The sound-producing unit is the same of the Yamaha TX81Z module, namely the Yamaha YM2414 soundchip. The YS/TQ units contain 100 preset voices stored on ROM and an additional 100 user-configurable sounds in RAM. Voices can be assigned to up to 8 Instruments, which in turn can be layered into configurations called Performances, thus providing more interesting sounds than one voice could alone. One common way to use this feature is to include several instances of the same voice in the same performance while detuning each of them slightly to create a "thicker" or more lively sound. The engine also provides a number of effects, including reverb, delay, and distortion. 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「Yamaha YS200」の詳細全文を読む スポンサード リンク
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