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Rhodes Chroma
The ARP Chroma is a polyphonic, multitimbral, microprocessor controlled, subtractive synthesis analog synthesizer developed in 1979-1980〔(【引用サイトリンク】title=This section provides information on all of the MIDI kits that are - or have been - available for the Chroma. )〕 by ARP Instruments, Inc. just before the company's bankruptcy and collapse in 1981.〔(【引用サイトリンク】title=The Rise and Fall of ARP Instruments )〕
The design was purchased by
CBS Musical Instruments and put into production by their Rhodes Division in 1982 as the Rhodes Chroma at a list price of US $5295.〔(【引用サイトリンク】title=Retail Prices )〕 They also released a keyboard-less version of the Chroma called the Chroma Expander at a list price of US $3150.〔
The Chroma was one of the early microprocessor controlled analog synthesizers. It was designed before MIDI and featured a 25-pin D-sub connector computer interface used to slave the Expander to the Chroma. Also, an Apple IIe interface card and sequencing software was available.〔(【引用サイトリンク】title=This section contains the entire Chroma Interface Manual (1986). )〕〔(【引用サイトリンク】title=This is an excerpt (Appendix O) from the Sequencer Manual related to the Apple II interface card. )〕
The Rhodes Chroma and Expander were discontinued in 1984.〔(【引用サイトリンク】title=...after the Chroma was discontinued (in 1984). )〕 Somewhere between 1400 and 3000 Chromas and Expanders were built.〔(【引用サイトリンク】title=...assuming that there were no gaps, approximately 1400 instruments were produced in all. ...This is still nowhere near the 3000 that Philip Dodds claimed in the Mark Vail Keyboard interview. )〕
==Keyboard Velocity and Pressure==
The Chroma has a velocity sensitive keyboard consisting of 64 weighted, levered wooden keys that resemble piano keys.
Every Chroma has software and interface hardware for an optional polyphonic pressure sensitive keyboard sensor. But few units have the original factory pressure sensor installed. In 2009,〔(【引用サイトリンク】title=Site News )〕 a pressure sensor retrofit kit was produced by a third party.〔(【引用サイトリンク】title=Pressure Sensor Retrofit Kit )〕 At the time of writing (2015) the kit may still be available.
抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』
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