The SY-2 has many more variable parameters than the SY-1. It's almost the complete GX-1 VCO LPF HPF VCA voice structure, with just a few things determined by the preset only.
The waveform (sawtooth or pulse), VCF modulation, PW modulation and octave (high or low) are determined by signals connected to the 14 voice switches. These could be replaced with simple on/off switches.
Of all the other parameters, only three are preset and not adjustable using the variable controls: filter envelope initial level and release (using CS-50/60/80 terminology) and filter envelope polarity. Controls for everything else are provided, with a system for bringing groups of them in or out of operation.
From: David Rogoff
Sent: Monday, November 03, 2008 7:47 PM
To:
yamahacs80@yahoogroups.com Subject: Re: [yamahacs80] SY-1 service manual....?
FYI - just looked on eBay and found several CSY-1 service manuals for
sale!!!
http://shop.ebay.com/?_from=R40&_trksid=m38.l1313&_nkw=yamaha+csy∗&_sacat=See-All-CategoriesAlso, can someone explain the differences between the SY1 and the SY2,
other than the case.
David
David Rogoff wrote:
> Tom,
>
> I have about half of it scanned. I need to get back to it. I'll try and
> put up what I have so far in the next few days.
>
> David
>
> Quazimodo wrote:
> > Hi David,
> >
> > I was wondering if the SY-1 service manual was up on your site yet
> > please. The link below only shows the front cover of the manual.
> >
> > I just picked up a CSY-1 organ and would maybe like to have a go at
> > "extracting" the synth section...
> >
> > Cheers,
> > Tom
> >
> >
> >
> >
> > --- In yamahacs80@yahoogroups.com, David Rogoff <david@...> wrote:
> > > >
> > > Close. Sort of the top keyboard of one:
> > > http://therogoffs.com/cs80/manuals/SY1_Service_Manual/00%20-%20cover.jpg
> > >
> > > By the way, the missing pages are now scanned and one the site.
> > >
> > > David
> >
> >
>
>
>
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