The Roland JD-990 Super JD is an updated version of the Roland JD-800 synthesizer in the form of a module with expanded capabilities, which was released in 1993 by Roland Corporation. JD-990 is a multitimbral synthesizer utilising PCM sample-based synthesis technology.[1] In a sense it is not a true module version of a JD-800 as it has many expanded features and as a result the two are incompatible in exchanging presets. It is equipped with 6 MB of ROM containing sampled PCM waveforms, four sets of stereo outputs that are assignable to individual, internal, instruments, and standard MIDI in/out/through ports. JD-990 has a large LCD display[2] and programming takes place through a keypad on the front panel of the unit. The unit can generate multi-timbral sounds reminiscent of the vintage analogue synthesizers but is also capable of generation of modern digital textures. There are several expansion boards available for JD-990 that can be installed in the provided expansion slot in the chassis of the unit.[3]
Features
The JD-990 had the following[4] features which were not available on the JD-800:
^"Apollo 440: Gettin' High On Your Own Supply". Future Music. No. 220. November 2009. p. 20. ISSN0967-0378. OCLC1032779031.
^Snoman, Rick (2004). Dance Music Manual: Tools, Toys, and Techniques (2nd ed.). Focal Press (published 2012). p. 87. ISBN9781283709583. OCLC819507201.