[PD] emulating early video synths - sync

Thu May 4 23:31:53 CEST 2006

Here are a few modifications I tried: you can make a nice centered
circle. Got the synch to work with bang~. Do not understand the
values, found them by trial and error. Lots of fun.

Tom

On 5/4/06, shift8 <shift8 at digitrash.com> wrote:
> great fun - thanks!
>
> On Thu, 2006-05-04 at 13:36 -0400, Paris Treantafeles wrote:
> > Ah.. well.. in this case it's kind of weird cause i have inputs into
> > RG and B.
> > Try one at a time and setting the others to nothing.
> > Imagine also that each R, G and B could have a completely different
> > wave resulting wave form going in.
> >
> > And yes... the pix objects are really fun to add as well.
> >
> > Best,
> > p
> >
> > On May 4, 2006, at 1:34 PM, Kyle Klipowicz wrote:
> >
> > > 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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> > >> >
> > >> > (((())))(()()((((((((()())))()(((((((())()()())())))
> > >> > (())))))(()))))))))))))(((((((((((()()))))))))((())))
> > >> > ))(((((((((((())))())))))))))))))))__________
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> > >>
> > >>
> > >>
> > >
> > >
> > > --
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> > > http://theradioproject.com
> > > http://perhapsidid.blogspot.com
> > >
> > > (((())))(()()((((((((()())))()(((((((())()()())())))
> > > (())))))(()))))))))))))(((((((((((()()))))))))((())))
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> >
> >
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