[PD] emulating early video synths - sync

[Paris Treantafeles]

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