[PD] emulating early video synths - sync
kyleklip at gmail.com
Thu May 4 18:16:34 CEST 2006
Would you care to share your work with the list, in patch form?
On 5/4/06, Paris Treantafeles <paris at parisgraphics.com> wrote:
> haha... i can't be the only one who has hit "send" then figured out
> the problem.
> basically i wasn't really resetting the oscillators since sending a
> number to the right inlet of the oscillator wasn't enough.
> once i added a metro and "banged" the input, the sync worked.
> still... if there's anything that comes to mind regarding best block~
> to use, please feel free to share.
> On May 4, 2006, at 11:48 AM, Paris Treantafeles wrote:
> > Hello List,
> > I've created a few patches with PD/GEM to emulate early video
> > synths such as the Sandin, etc. which I'm quite happy with.
> > At the heart of these patches is pix_sig2pix~
> > One thing I can't figure out though has to do with preventing the
> > image from "rolling" - i.e. to stand still.
> > The early video synths did this by having a "sync" input to
> > oscillators.
> > So if you fed one oscillator a vertical sync (~60 Hz) you would get
> > stationary vertical bars whose width would depend on the main
> > frequency of the oscillator. Doing this with another oscillator
> > receiving a horizontal sync (~1500 Hz) results in horizontal bars.
> > By mixing these and perhaps another (and adjusting the attenuation
> > of these), various shapes appear.
> > I can get all of this and more (e.g. add some filters for
> > subtractive synthesis) but what I'm missing is how to do the sync
> > correctly.
> > Trying various values as reset inputs to say "phasor~" doesn't do it.
> > I'm wondering if this is in fact related to blocksize~ instead.
> > e.g. should the reset values of the oscillators be related in
> > someway to the value set in blocksize~
> > Does anyone have any ideas about this?
> > Thanks for any suggestions!
> > Best,
> > p
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