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]
The unit used additive synthesis for sound generation, chorus and ports included MIDI[2] In, Out and Through, RCA outputs (stereo), Headphones and level controls for both channels. It also has on board speakers.[2]
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.
A MIDI 1000 note sequencer called the DS1000 was also produced for use with the DS-250 (and other MIDI devices) in 1986.[1] It had four buttons Record, play, stop and pause, a tempo slider.[2]
Mostly known for its pad and bell type sounds.
