[PD] emulating early video synths - sync

Kyle Klipowicz kyleklip at gmail.com
Thu May 4 19:34:29 CEST 2006


Oh wow, this is really neat.  I wonder how you can control the
colors...Jeez I need to play with the pix_* objects more!

~Kyle

On 5/4/06, Paris Treantafeles <paris at parisgraphics.com> wrote:
> Hi Kyle and List,
>
> On second thought, it might take a while for me to get back to
> putting this all together with the earlier patches so attached is
> just a simple experiment.
> No big deal - it takes two oscillators and puts them into RGB.
>
> To use this:
> 1. hit destroy/create+DSP on the left.
>
> 2. activate the toggle (green of the left oscillator).
> use the slider to adjust a frequency of some horizontal (ish) bars.
> (maybe around ~20)
> start the metro to "freeze" the image.
>
> 3. turn off the oscillator and do the same with the osc on the right
> but go for something like vertical bars.
> maybe around 16000.
>
> 4. turn them both on now to see the combined result.
> a circular pattern.
>
> if you now modulate either oscillator you will get some motion but it
> will be more controlled.
>
>
> A final video synth would have a variety of oscillators to choose
> from, a mixer for adjusting the amplitudes of each waveform, filters
> and other "pix_" operations, e.g. invert, etc.
> There's a ton of ways to go with this.
>
> 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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> >
> >
> > --
> >
> > http://theradioproject.com
> > http://perhapsidid.blogspot.com
> >
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> > (())))))(()))))))))))))(((((((((((()()))))))))((())))
> > ))(((((((((((())))())))))))))))))))__________
> > _____())))))(((((((((((((()))))))))))_______
> > ((((((())))))))))))((((((((000)))oOOOOOO
>
>
>
>
>


--

http://theradioproject.com
http://perhapsidid.blogspot.com

(((())))(()()((((((((()())))()(((((((())()()())())))
(())))))(()))))))))))))(((((((((((()()))))))))((())))
))(((((((((((())))())))))))))))))))__________
_____())))))(((((((((((((()))))))))))_______
((((((())))))))))))((((((((000)))oOOOOOO




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