[sdiy] PLL-controlled VCO

[Heitor Alves]

Actually the C64 had a sound chip called SID, used in many synth
projects, mainly the suberb Midibox SID by Thorsten Klose in
www.ucapps.de

:o)

On 5/13/05, Ray Wilson <raywilson at comcast.net> wrote:
> The Commodore 64 actually has a very cool synth chip in it that provides
> quite a bit of versatility. If you can find the old 1" thick Commodore 64
> manual it had the complete port mapping and control information. I wish I
> would have kept my C64 even as a piece of art. It was quite the computer for
> its day. But to stay on topic again I mention the VIC chip (I think it was
> called).
> 
> Ray
> 
> ----- Original Message -----
> From: "Andrew Wyld" <andrewwyld at hotmail.com>
> To: <synth-diy at dropmix.xs4all.nl>
> Sent: Thursday, May 12, 2005 8:06 PM
> Subject: [sdiy] PLL-controlled VCO
> 
> > Hi there,
> >
> > I am wondering if it is possible to use an arbitrarily weird VCO in a PLL.
> > Basically I want to use a square wave from a computer (specifically a
> > horribly cannibalized Commodore 64) to drive an analogue VCO, making a
> > drift-free synth that can be sequenced and controlled completely from the
> > computer console, but still sounds like an analogue synth.
> >
> > I'm figuring I can do this if I do some kind of horrible gating operation
> > on
> > the VCO.  What would people suggest I read up on / look up on the net /
> > etc?
> >
> > Thanks!
> >
> > Andrew Wyld
> >
> > postmaster at ripe-fruit.co.uk
> > http://www.ripe-fruit.co.uk/
> >
> > --
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> >
> 
>