Seiko DS-250

The DS-250 was an electronic keyboard manufactured in 1985[3] by Seiko and was considered a commercial failure.[4] It was capable of generating both digital and additive sounds.[5] It is expandable with two expander units DS-310 and DS-320.[6]

DS-250
ManufacturerSeiko
Dates1985
Technical specifications
Polyphony8 voice
Timbrality1 part
OscillatorSine
LFO1
Synthesis typeDigital Additive
FilterNo
Storage memory4 user memory[1]
EffectsChorus
Input/output
Keyboard61 keys
Left-hand controlPitch bend wheel[2]
External controlMIDI In, out, thru

Features

The unit used additive synthesis for sound generation, chorus and ports included MIDI[7] In, Out and Through, RCA outputs( stereo), Headphones and level controls for both channels. It also has on board speakers.[8] It is capable of running either a single sound or two sounds at once either layered or split and each of these can be used on its own MIDI channel (there are small dials on the end of the keyboard to set each channel).

There are 16 preset sounds and these are all editable within a very limited context of volume, sustain (3 levels) and a variable vibrato (with vibrato delay switch). You can change the detune and pitch intervals between the two layered sounds.

DS1000 sequencer

A MIDI 1000 note sequencer was also produced for use with the DS-250 in 1986[9] (and other MIDI devices) called the DS1000. It had four buttons Record, play, stop and pause, a tempo slider.[10]

Famous Users

Sounds

Mostly known for its pad and bell type sounds.

References
  1. "Seiko DS250 / DS 310 (1984) | Aerozone JMJ". aerozonejmj.fr (in French). Retrieved 2018-08-20.
  2. "Dave's Seiko crapola". www.umop.com. Retrieved 2018-08-20.
  3. "Seiko DS-250". www.matrixsynth.com. Retrieved 2018-06-05.
  4. "Jean-Michel Jarre's Time Machine". KeyboardMag. Retrieved 2018-08-20.
  5. "Seiko DS-250". www.matrixsynth.com. Retrieved 2018-06-25.
  6. "Seiko DS-250". www.99musik.se (in Swedish). Retrieved 2018-08-20.
  7. "Dave's Seiko crapola". www.umop.com. Retrieved 2018-06-25.
  8. "Dave's Seiko crapola". www.umop.com. Retrieved 2018-08-20.
  9. "Seiko DS250 / DS 310 (1984) | Aerozone JMJ". aerozonejmj.fr (in French). Retrieved 2018-08-20.
  10. "Dave's Seiko crapola". www.umop.com. Retrieved 2018-08-20.
  11. "You searched for seiko - Synthwatchers.com". Synthwatchers.com. Retrieved 2018-06-05.
  12. Inc., Equipboard. "Jean Michel Jarre's Seiko DS 250". Equipboard. Retrieved 2018-07-25.
  13. "SEIKO DS 250". www.jarrography.free.fr. Retrieved 2018-07-25.
  14. "Jean Michel JARRE | Rendez-Vous". Disques Dreyfus (in French). Retrieved 2018-07-25.
  15. "Jean Michel JARRE | Rendez-Vous". Disques Dreyfus (in French). Retrieved 2018-08-20.
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