[sdiy] Siel opera6 schematics

[Bob Weigel]

Polysix is a great choice for plucky, tweaky, spacy or pad sounds in 
particular I think.  The Opera 6/DK600 does really great ominous brass 
sounds like in Blade Runner intro, and also some interesting keyboard 
sounds and also interesting plucky sounds.  And some good sweeps.  The 
diversity of the Polysix is greater I think because of the vco's 
independence (Allowing portamento and unison mode) but also because of 
the arpeggiator and fx sections which are very cool.  But the DK600 has 
it's own realm and it is a great complimentary synth to other 
instruments. Both have real EG's and the same SSM2044 vcf's.  Oh and of 
course the DK600/opera6 have at least crude MIDI built in and more patch 
storage and crude velocity.  Very rough 3 or 4 bit..can't recall.  -Bob

damsagain at free.fr wrote:

>Hi everybody,
>
>My english is very poor excuse me.
>
>Tom, Ulrich, Yves, ASSI, Neil, Scott, Andre and Bob (hope I forgot nobody) I
>would like to say thank you ! Thank you for your answers, for your advices, for
>allowing me to make a choice... thank you !
>
>It was my first post maybe not the last. I don't know. But I kown there is cool
>people in this mailing list !
>
>I decided it was not a good idea to buy the Siel given the DCO were missing...
>
>So I always search a polyphonic and analogic syntheziser... Why not a Polysix so
>?
>It seems to be a really good machine, but quite expensive !
>Maybe one day I would be lucky.
>:)
>
>Regards,
>Damien
>
>
>
>
>Selon Tom Wiltshire <tom at electricdruid.net>:
>
>  
>
>>Damian,
>>
>>There are Opera6 schematics available somewhere, 'cos I've got a
>>copy. Furthermore, the quality is pretty good - way better than some
>>of the unreadable rubbish you find online (JX3P?!).
>>  It's one of the ones I've been looking at whilst thinking about DCOs.
>>If you don't find it anywhere (or can't be bothered to look), I'll
>>send it to you.
>>
>>To determine whether the synth is repairable, you'd need to know
>>which ICs have been removed. The design has 8253 counter-based DCOs,
>>followed by SSM2044 filter and SSM2024 quad VCA, controlled by a
>>SSM2056 Envelope generator per voice. It's very similar to the Korg
>>Polysix (except that had VCOs) or the Poly61.
>>
>>If someone thought the synth wasn't a viable repair, they might well
>>have removed the valuable SSMs to sell. You could probably cover the
>>cost of the synth like that. The SSM2044 filters are still available,
>>but the envelope generators might be hard to find. Alternatively,
>>find a dead Polysix (not hard - they die all the time) that hasn't
>>been stripped and use that for parts.
>>
>>Regards,
>>Tom
>>
>>On 17 Dec 2008, at 13:17, damsagain at free.fr wrote:
>>
>>    
>>
>>>Hi everybody,
>>>
>>>I was searching a vintage Siel Opera 6 Analogic synthesizer when I
>>>found an ad
>>>about it but the seller said to me that I would have to restore it.
>>>Indeed he told me that integrated circuits missed on his Opera 6.
>>>So I have a question :
>>>- Does Siel Opera 6 schematics exist ?
>>>I search on the web but I found nothing.
>>>
>>>However I wonder :  Does it a good idea trying to fix that
>>>synthesizer while I
>>>don't really know why IC have been removed ?
>>>
>>>:-/
>>>Thank you for your interest.
>>>Best regards,
>>>Damien
>>>
>>>_______________________________________________
>>>Synth-diy mailing list
>>>Synth-diy at dropmix.xs4all.nl
>>>http://dropmix.xs4all.nl/mailman/listinfo/synth-diy
>>>
>>>      
>>>
>>
>>    
>>
>
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