Yahoo Group? [sdiy] [AH] analog video synthesizers

[Cynthia Webster]

Yes Gavin!  

It's a Great Idea to start such a Yahoo Group

There's a couple of interesting groups out there including
 the LEV group Live Experimental Video,

    lev-digest at shoko.calarts.edu

and the Yahoo Eyecandy VJ group...

    eyecandy at yahoogroups.com

But they're all into laptops running visual object oriented effects engines.

Virtually no one is talking the big "A" as in Analog...

I think that there'd be great interest in it!
Also the Yahoo group would allow us all to post schematics, and pics, and
links, and do a daily-digest mode (things that cannot be done around here)!

I'm in!

Cynthia



on 5/28/02 1:16 PM, Gavin Russom at elmystico at earthlink.net wrote:

> 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!!
> 
> ----------
>> 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
>>