via
this auction
"Very rare synthesizer made by Seiko in 1985. This is a very, very rare synthesizer and don't let the Casio like toy exterior fool you it is capable of making both digital and additive sounds not to mention it was used by famous French synth musician Jean-Michel Jarre on the album Rendez-vous.
This synthesizer is early digital and additive together. It can make PPG like clear sounds with a bit of grit as well as Juno like pads. Yes you read it, its capable of making some nice analog style pads. It has basic editing features on the front panel of the synth.
Now heres what makes this already synth even rarer. It has a SRC-10 voice expander cartridge installed for additional patches. I cannot find anything on the net pertaining to this upgrade. It is a Seiko upgrade as you can see in the picture but nothing is available about it. I can say it is does add additional patches.
The DS-250 has stereo outputs, midi in,out and thru, RCA outputs(stereo), phones and level controls for both channels, You can split the synthesizer for two tones at once making it bi-timbral. Quite alot for a rare synthesizer from 1985."
If you know more about this one, feel free to comment.
Update via Dave in the comments: "I had one of these for a few months... it was suprisingly not 100% horrible. Even came with an external sequencer. Here's my little
page on it, with a sound sample."
Update via the comments: "I see a lot of scammers on Ebay trying to sell Seiko 250's, claiming that the power cord has been "lost" like it isn't a big deal.
1-First of all, this keyboard needs a power supply, not just a "power cord".
2-Without the power supply, the keyboard is useless. Why? because the power supply is impossible to find. The power supply has a dual voltage design and the connector is non-standard, which means if you buy a unit without a power supply, you are going to have to pay someone to design and make one from scratch. This is not hard if you know what you are doing, but if you were to pay someone to do it, expect to pay at least a couple of hundred bucks or more.. which is more money than what the keyboard is worth."
"there is a new mailing list called TRY for experimental electronics / art. its intended to be sort of an all encompassing mesh of new audio device announcements, idea exchange, bender Q and A, pedal / synth builder announcements, live show announcements, parts trading post...… you get the idea."
This synthesizer is early digital and additive together. It can make PPG like clear sounds with a bit of grit as well as Juno like pads. Yes you read it, its capable of making some nice analog style pads. It has basic editing features on the front panel of the synth.
The DS-250 has stereo outputs, midi in,out and thru, RCA outputs(stereo), phones and level controls for both channels, You can split the synthesizer for two tones at once making it bi-timbral. Quite alot for a rare synthesizer from 1985."
Title link takes you to the overview on Sonic State. This is a good one, so don't miss it. via Sonic State in the comments of this post. I captured this shot to show how the surface actually consists of physical "buttons." Part of the appeal (or not) is that it does have this tactile interface rather than a flat screen with leds.
