[sdiy] [AH] analog video synthesizers

[Gavin Russom]

I have been into this thing for a while too and was happy to return home and
find all these V-synth related posts.  Although I seem to be missing some
posts and there'a also somethings I don't understand.
OK...
Does an analog video synth basically consist of oscillators at high
frequency going into a sync generator, and what exactly is a sync generator
and how does it work.  
What about using an audio synth hooked into a RGB computer monitor with RCA
inputs?
what kind of results does that produce.  
Any leads on an NTSC Video Interface Module?
Is there a videosynth DIY list?
If there's significant interest I'd start one, although it would be a Yahoo
list
I also have some pretty interesting app notes and schematics I've found
although I believe many of them contain obsolete chips but if anyone's
interested I can post them on or off list
Allright let's get into it!!

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>From: eric b <metasonix at earthlink.net>
>To: synth-diy at dropmix.xs4all.nl
>Subject: Re: [sdiy] [AH] analog video synthesizers
>Date: Mon, May 27, 2002, 11:30 PM
>

>>video-signals. This won't work out of the box, you need a cheap
>>framegrabber-card (50 bucks), some programming experiences and two month
>>time. then you can do almost everything you want in fine highres realtime on
>>the screen. Some VJ teams already use this with success.
>
>well, IMO not many artists have the patience to do this...
>
>>If you not after PAL or NTSC, but you simply want video a cheapo ramdac for
>>VGA might be an option. You need a pic to programm the timing once, and then
>>you can feed analog signals through 3 ADC's right into the chip. Most
>
>Even fewer diyers would have the ability to do this.
>
>>Using a ramdac is even cheaper because old RGB's are hard to get.
>
>Go to the surplus outlets in the San Francisco Bay area.
>Places like the Weirdstuff Warehouse have pallets full of old monitors.
>Like 19" RGB displays that came off defunct CAD systems,
>usually for prices like $50 to 100. 
>If it's not VGA or Macintosh usable, it's worthless...
>
>>It is quite easy the produce a composite sync signal with the Philips 
>>SAA1101 (universal sync generator) (both pal and ntsc capable)
>>After that a mixer and a RGB encoder
>>I planned to use the SONY CXA1645.
>
>Attaboy. Just be smart, and buy plenty of spare ICs.
>I will bet you some good money---those chips will be,
>or already have been, discontinued.
>
>
>
>
>
>E. Barbour
>metasonix
>