"This is a two-cabinet EML 500 synthesizer. It does not work.
We bought it some time ago as a project however now it appears we're never going to get around to restoring it. Pictures 2-4 are of the left cabinet and pictures 5-7 are of the right cabinet. The left cabinet power supply (picture 4) connects to the right cabinet (picture 7) via a multi-pin cable with Cinch-Jones connectors, which we do not have.
The "controllers" portion of the left cabinet (picture 2) appears to be bereft of controllers, though if you look at it from the inside (picture 3) the PCB looks to be complete and in good shape, possibly the sliders broke off. The right hand cabinet (picture 5) also has no controllers, though here (picture 6) there is no PCB at all. After I got the power supply working and the left-hand cabinet (picture 2) going, it was my intention to complete the right-hand cabinet (picture 5) with a modern set of controllers from e.g. synthesis technology or one of the several other kit manufacturers, rather than trying to replicate the original PCB, which probably would be impossible to do anyway. Many of the controls on both cabinets are labeled though I don't know if the labels are accurate. The cabinets and panels are in G+ condition with some scratching. I don't know what to make of this synth, my best guess is that it was some kind of a prototype. It definitely looks restorable, though if you buy it please be prepared for some effort to get it back in action. For all of these reasons, regretfully sold "as is." Local pick-up in the Los Angeles, CA area welcome."
YouTube Published on Aug 3, 2012 by martythevampire1
"This is a quick demo of the rare and unusual Seiko DS-250 (forgive the playing - this is just to show all the preset sounds as this isn't anywhere else on the net).
Famous for being used by Jean-Michel Jarre on his 1986 Rendez-vous album (used on First Rendez-vous and Last Rendez-vous "Ron's piece"). This is a quick demo of the on board sounds and to give an overview of what it sounds like as there is limited information online about this keyboard/synth.
There are 16 basic sounds that can be split/layered and there is also a three stage release envelope (off, short, long) and a two stage chorus. Along with this is a single modulation control that controls depth and speed simultaneously with a start delay and a interval control that can add 3rd, 5th, 7th and octave harmonics into the sound. There is also a detune and pitch bender wheel as well as a transpose function. Midi in/out/thru is also on the Seiko along with individually selectable channels for Sound 1 and Sound 2.
Recorded direct via 2 x Avalon U5 DI boxes and no reverb / effects / eq other than the internal chorus on the DS-250. The two outputs when in split mode pan the sounds through two outputs (on this video set as left/right)."
"The HT-6000 introduced for the HT line some of the more high-end features, such as ring-modulation, detuning, key-follow, and initial-touch. The HT-6000 used an impressive 4 DCO's per voice. It had 64 DCO wave forms to choose from (32 basic, 16 with noise [white or metallic], and 16 with ring modulation). It had 8 independent VCF filters , and added key-follow parameters for both the DCA and VCF. The DCA also added attack and decay curves (acute and obtuse). It also added an independent ADSR envelope for noise. The 4 DCO's each use the same waveform, VCF and DCA envelopes, but can have separate tunings, velocity response curves, and relative DCA envelope depths. Stacking the oscillators with detunes allowed the creation of flange and chorus effects, fat "super saws", and the creation of dual-note or even triad and 4-note leads. The filter cutoffs could be set to respond to velocity which added some expressiveness. Because each oscillator could have separate tuning and velocity response, it was also possible to have the pitch change according to pressure, if one of two differently tuned oscillators had an inverse velocity curve. Ring modulation used ocsillator 4 to modulate oscillator 3, and allowed the creation of metallic and pulse sounds, lower bass harmonics and even distortion."
YouTube Published on Aug 3, 2012 by BrazdaluiNovac
"This is a track made only with patches from a soundset I am working on for S|C ProTone. Drum and percussion sounds coming from S|C ProTone too
No other effects added,no master, no eq, compression or something that may mislead you, it's the raw sound of the synthesizer. (as much as youtube can reproduce it after conversion)
More patches and demos coming soon featuring synthesizers from Sonic Core.