[PD] emulating early video synths - sync

Paris Treantafeles paris at parisgraphics.com
Thu May 4 18:29:01 CEST 2006


Hi Kyle,

Let me work this feature into my older patches that have much more to  
offer first, then I'll post a link if anyone is interested.

Best,
p


On May 4, 2006, at 12:16 PM, Kyle Klipowicz wrote:

> Would you care to share your work with the list, in patch form?
>
> ~Kyle
>
> 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.
>>
>> best,
>> p
>>
>>
>> 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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>>
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>
>
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