Seiko Ds-202/Ds-310/Ds-320 FULL SYSTEM

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via this listing

"a Rare vintage Seiko FULL SYSTEM (with Ds-202 keyboard,Ds-310 synth & Ds-320 sequencer)

- FUNCTIONALLY:

Ds-310 & Ds-320 are fully working.

Ds-202 is fully working except accompaniment section sometimes works and other no...Left Speaker is mute...

- COSMETICALLY:

Everything is in great conditions despite the Ds-310 module which was completely rebuilt after it was damaged after shipping (shipped in a very bad way by the previous owner)

- Original Case included"

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Rare Seiko MR1000 - Midi Digital Sequencer/Midi Recorder, (aka DS1000) SN 33504909

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via this listing

"quite rare midi digital keyboard recorder (sequencer), made in Japan, in 1985, as far as I know.

tiny thing, is capable of recording incoming midi keyboard playing, overdubbing it, looping it, and being played by it’s own clock, or by external midi clock.

extremely simple and easy to use.

really great condition, amazingly preserved piece.

on the last picture you can see a match box, shown purely to underline the compact size of the sequencer unit. matches are not included by default, but if you want yourself a box of these amazing matches - drop me a message, and they will be included for your joy."

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ESK - Sequencer + Seiko DS-250 + DS-310

video upload by Metunar

Follow-up to this post.

"Testing the Seiko DS-250 + DS-310 digital additiv synthesizer with a sequencer.
The Elektron Digitone is only for sequencing and effects.
I didn’t change the spectrum or envelope parameters live, because it makes digital noises.
By the way, the Midi of the Seiko DS-250 is super strange. Midi input is the connector labeled „Midi Thru“. Why did they do that?
Soft Mastering.

http://www.metunar.ch"

ESK - Sound Demo Seiko DS-250 + DS-310

video upload by Metunar

"A sound demo of the Seiko DS-250 digital additiv synthesizer and the programmer Seiko DS-310.
The Elektron Digitakt is used 2 times for some extra reverb or delay.
Soft Mastering."

http://www.metunar.ch

Rare Seiko SQH-379 Prima Harmony Trainer SN 37900074

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via this auction

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Seiko Babble

video upload by zack dagoba

"Some abstract tonalities on the Seiko DS250 / DS310 additive synthesiser from 1985

This is a very interesting instrument - I love these kinds of early digital systems!"

Seiko DS-320/DS-202/DS-310 Electronic Synthesizer Sequencer

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via this auction

You can find a demo of one here.

"This is a vintage, Seiko DS 202 additive synthesizer with both the DS 310 and DS 320 attachments! Some friends had this in storage in the attic since the 80’s and gave it to us.

SEIKO's system was built around a 16 harmonic additive synthesis engine. The user can set any of 16 levels for creating the waveforms / sounds that could be played on the keyboard. The synth also features two envelopes and and LFO for shaping and modulation of the sounds.

Basic sounds (namely PIANO ORGAN HARPSICHORD FLUTE STRINGS ELECTRIC PIANO JAZZ ORGAN VIBRAPHONE CLARINET BRASS) are crystal-clear. They can be edited using the LPF filter, Envelope Selectors 1-4, 4 sounds that can be saved and two chorus effects. The delay (off, short or long) and sustain attack and release can be set using the ‘Time” sliders which happen to be very precise (values include 0, 0.01, 0.02 , 1, 2, 3, 5 or 10 seconds). Every parameter can be set using the LCD screen, the 4 envelopes available can be visualized as well as the spectrum settings (over 16 harmonics)."

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Seiko's Forgotten Synthwave Dream Machine

video upload by HAINBACH

"In 1983 Yamaha released the DX7, which became the most successful synthesizer of its time. To much less acclaim, Japanese watch-maker SEIKO put out the DS-System in the same year. All but forgotten today, the DS is rather strange - it consists of a home keyboard that can be expanded with an additive synthesizer and a sequencer module. A complete flop when it came it, but rather charming for today's Vapor- and Synthwave schooled ears.

Soundpacks, Music and Love: http://patreon.com/hainbach

*CHECK-OUT ROBERT SCHRÖDER HERE*: https://www.news-music.de"

Vintage Rare Seiko MR1000 MIDI Digital Sequencer SN 33500847 w/ Original Box

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via this auction

This appears to be the first Seiko MR1000 featured on the site.

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Seiko DS-320 Digital Sequencer (expansion for DS-202/250 polyphonic synthesizer) SN 32003431

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SEIKO キーボード カタログ 昭和58年10月 video upload by Happy Lucky Soul チャンネル

via this auction

Note the listing is for the sequencer only, not the complete system in the video above. See this post for a demo of another system.

"The Seiko 202/250 (maybe more?) are quite rare on their own merit, so the expansions (the DS-320 and DS-310) are even rarer. Since these units didn't do very well commercially, they weren't produced for very long - hardly any were collected/kept. If you find some demo's of what these are capable of, you'll definitley be itching for one - and this sequencer adds to the madness. The whole setup was supposed to rival the Synclavier (with varying results) but really amounts to some very interesting 80's additive synthesis. JM Jarre used this on a couple of his notable compositions (but, as is the case for just about every synthesizer)..."

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Seiko DS1000 Vintage Midi Sequencer w/ Original Box

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via this auction

This appears to be the first one featured on the site.

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Seiko DS-101 SN 10100477

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Published on Jun 1, 2020 StudioSoba

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"Up for sale is very hard to find rare Seiko DS-101 in very nice excellent condition! Fully Working and Ready to Play.

This one was in very good working shape. Its in very good condition for its age, all keys, sliders, buttons, pitch knob work fine and speakers are still super loud on this unit. Has few minor scratches and lines and small smudge on some keys not visible, everything works and feels smooth.

Check the demo video of unit working."

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Vintage 1985 Seiko DS-250 61-Key Digital Additive Synthesizer SN 25000418

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via this auction

"Comes with original expression pedal, original switch pedal, custom case, original manuals, power supply, music stand attachment, sales brochure, user friendly guide, and DS310 programmers guide."

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Seiko DS-250 Digital Synthesizer

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via this auction, also on Reverb


"Very rare digital synthesizer from Japan.
Some capacitors are replaced.

We have power supply for 230V, if your voltage 120V, we need one week for make power supply for you!

Very good condition, but it has some scratches."

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SEIKO DS-250 + DS-310 w/ Original Silver Gig Bags & SEIKO DS-202, DS-310, DS-320

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"SEIKO DS-250 + DS-310 MEGA RARE Vintage Modular Synthesizer system + BAGS!

Used by Jean Michel Jarre in some his amazing compositions!!!
EXCELLENT cosmetic conditions. Complete Setup plus original silver bags, very nice!!! Sequencer manual and 3x Memory cards! Very nice polyphonic system, COOL DRONES! Sounds unique with a built in Chorus!
Perfect working conditions!"

You can find demos here, and here.

SEIKO DS-202, DS-310, DS-320 pictured further below via via this auction

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SEIKO DS250 + DS310 Vintage Synthesizer System Short Test

OK prov Published on Nov 28, 2019 Scienceforce

Seiko DS-250/DS-310 Vintage Digital Synthesizer SN 25000189 & 31004072

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via this auction

"Rare Seiko DS-250 keyboard with the DS-310 digital synthesizer add-on. This addition makes the DS-250 a programmable additive synth. The keyboard and the DS-310 are in good condition. Everything functions as designed.
Here is a list of everything that comes with the Seiko:

-The DS-250 itself
-DS-310 Digital Synthesizer (programmer for DS-250)
-Power Supply
-Soft padded carrying case for the DS-250

This is the bigger, MIDI capable brother of the sekio DS-202. The DS-320 addon, a sequencer, does NOT work with the DS-250. It is not needed because the DS-250 has MIDI, and the DS-202 does not. There was desktop sequencer made to work with the DS-250 called the DS-1000, but it is useless in this day and age! Please see the photos also."

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San Diego School District SEIKO DS-310 Digital Synthesizer w/ Original Box

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via this auction

San Diego Unified School District SN 62055 sticker on the front. Interesting to think this was used to educate kids on synths back in the day.

Note the proprietary cable on the back. This was meant to go with the Seiko DS-250 as an expander. You can't play it without one unless you can somehow create the necessary connection.

See the Seiko label for more.  A DS-250 with DS-310 sequencer went up for sale last week.

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Seiko DS-250 Digital / Additive Synth Keyboard + Seiko DS-310 Sequencer

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via this auction

"Mid 1980s Seiko DS-250 Synthesizer and DS-320 expander unit, includes power supply, and miscellaneous cables. The DS-250 is about 38" x 13"."

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Seiko DS250 synthesizer

Published on Aug 1, 2018 Dennis Crommett

"Here's a rundown of the sounds and features of a Seiko DS250 synth from the 80's."