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Roland D-50
The Roland D-50 is a polyphonic 61-key synthesizer produced by Roland. It was released in 1987. Its features include Linear Arithmetic synthesis, on-board effects, a joystick for data manipulation, and an analog synthesis-styled layout design. The external Roland PG-1000 Programmer could also be attached to the D-50 for more complex manipulation of sounds. It was also produced in a rack-mount variant design, the D-550, with almost 450 user-adjustable parameters.〔("Roland D50" ), Sound On Sound, Jul 1997〕
The D-50's capabilities could be modified through the addition of 3rd-party products by Musitronics, most notably the M-EX which made the D-50 multitimbral (the D-50 was bi-timbral), as well as a chip that improved the D-50's response to incoming MIDI commands and a system for burning custom PCM cards with user samples for playback in the D-50.〔Mark Vail, Vintage Synthesizers, Miller Freeman, 1993, p. 63〕
==History==
The D-50 was the first affordable synthesizer to combine sample playback with digital synthesis, a process that Roland called Linear Arithmetic synthesis. The engineers at Roland determined the most difficult component of a realistic instrument to simulate is the attack, so the D-50 included almost 100 sampled attacks in ROM. The synthesizer played back an attack and used the synthesizer section to create the sustain of the sound. This dual-use method was required in 1987 since RAM was so expensive. Roland did, however, incorporate a number of "texture" samples that could be mixed into the synthesized sustain-part of a patch. These sustain samples gave many D-50 patches a lush and airy quality, particularly with its heavy use of choir, wind and string samples.〔("Roland D50" ), Sound On Sound, Jul 1997〕 The D-50 is probably the first virtual analog synthesizer;〔http://www.soundonsound.com/sos/jan05/articles/roland.htm "LA synthesis provided two simultaneous tone generators -- each comprising a PCM snippet and what was probably the first 'virtual-analogue' synth architecture"〕 the D50 was also the first digital synthesizer to integrate onboard digital effects.
The Roland D-50 was awarded a TEC Award for outstanding technical achievement in musical technology in 1988.〔(1988 TEC Awards )〕
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