Rare(?) synth?

[Duane R Balvage]

   Hi Everyone -


        I know this isn't REALLY diy, but it could be if I find

   out more info...


        I just bought a Sequential Circuits "Prelude" (mfd by SIEL).

   Anyone happen to know how rare this thing is, and where I might

   find a schematic? (Kevin, you out there?)

        The voice archetecture is bizarre, almost completely discrete

   CMOS logic - the only really "analog" portion is an LM13700 based

   VCF. It has 4 "tone registers" - Brass/Piano/Organ/Strings - each 

   with a few varia=tions of each. (the strings sound a 'la Crumar

   Performer, BTW) All voices have crude envelope adjustment except

   organ, and it has a chorus/flanger that sounds GREAT!! 

    It also has LFO (pitch only) and a 5 BAND GRAPHIC EQ!! (the EQ can

   make the strings sound almost vocal-like. It's WEEEIIRD!)

     One other thing- It's TOTALLY POLYPHONIC (ALL 49 KEYS?!) One switch

   per key closing to a common bus, sort of a modified Pratt-Read keyboard 

   assembly manufactured by FATAR. Shoot, this thing even has an external

   input!


       Sooo - anyone have any info (how common is it, what it might be worth,

   schematics, etc.) so I might be able to fix it (G5 and Ab5 are sounding

   together when EITHER key is pressed, and it's Not the key mech itself,

   I checked.), and then possibly MIDI it.

                                     Thanks for de info,


                                             Duane
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