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Roland D-550

Rackmount Sound Module/ Tone Generator

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D-550 1
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Roland D-550
Roland D-550
500.00 street price

D-550 is a rackmount version of Roland’s popular D-50. The unit features fewer controls though the circuit is identical.

D-550 is based on the capabilities of one of the most popular digital synthesizers not only ever created by Roland but ever emerged on the market D-50. The rack version was released in 1987. It features 16-voice polyphony which becomes an 8 one in a split or a dual mode. The architecture offers bitimbrality, 32 oscillators providing 2 per voice while in dual or split mode there are 4 per voice available. The synthesis is based on Roland’s Linear Arithmetic technology combined with 8-bit PCM samples onboard. The structure includes 3 LFOs. The filter section is represented with a low pass resonant filter TVF (Time Variant Filter) while the amp is also defined as TVA. Memory stores up to 64 patches.

Roland D-50 received a TEC Award in 1988 beating Yamah DX7 in popularity and waiting for the Korg M1 to come and take its laurels already the next year. D-50 was among the first synths to offer digital chorus and reverb as well as to include sample-based sounds not being a sampler.

D-50 was also unique back then owing to its digital wave generating while many other synths used to fill their structures with complete PCM wave samples. D-50 used PCM to sample acoustic instrument attack nuances as well as delivered samples of famous analog synthesizers processed through the analog path LFO, filter, amp stages.

As well as D-50 the instrument is MIDI compatible but the transmiting is possible only via one channel at a time.

Tags: digital synthesizer

Country of origin / production: Japan

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More info
 
Usage area
Sound Module/ Tone Generator 
Usage Design/ Form Factor
Rackmount, 2U 
Archetype
Digital (D) 
Polyphony
Voices16
Multi Timbral Capacity9 part(s)
Tone Generator / Sound Synthesis
Oscillators overall32
Oscillator Type Digital
Technology of Sound Generation PCM
Roland
LAS (Linear Arithmetic Synthesis) 
Oscillators per voice2
Programs/ Voices/ Timbres
Patches64
Filter
Low-pass Filter (LPF) 
Resonance 
MIDI in/ out
IN 
OUT 
THRU 
Built-in controllers
Joystick 
External controllers
External Control Panel 
Audio out
Stereo 
All voices mixed in one output 
Analogue: 1/4" (6.35mm)2
Analogue: 1/4" (6.35mm) headphones preamplified1
Power
Voltage 230V
Voltage 100V
Voltage 115/117V
Power Supply External
Case/ body
Metal 
Color
Black 
Production start1987
Production end1989
Production ended

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  • enpdf2.19Mb Roland D-550 Owner's Manual