USB Audio DAC mod + LaserBoy Correction Amp

[keeperx]

carmangary: If you're out there and happen to see this, check your email. I sent you information about another bug I found in spaghetti..

@DrLava: I'll try that updated driver once I get my spaghetti issues sorted. Right now I can't use it at all.

post that here
http://groups.google.com/group/slssug?pli=1

[drlava]

what I've found is that, the higher the number, the better the blanking test lines in the ilda pattern look,

If your scanners are tuned right and are 30k, it should look better up until 5 or 6 then it should go past optimal the other way and begin to 'look worse'.

you can seee part of the line the scanners trace just before they get to the starting point of the circle.

Adding blank delay usually does the opposite, if too much is added. Are you sure it's not a tail off the end of the circle? Where was the circle generated, anyway it might not have proper dwells at the start and end.

[ElektroFreak]

post that here
http://groups.google.com/group/slssug?pli=1

I just tried posting there, but for some reason my post isn't showing up. Maybe it will eventually.. Thanks for the info though..

[keeperx]

ElektroFreak he also reads that other forum you are a member of...
PM him there

[ElektroFreak]

Will do. I just figured he probably pays more attention to this forum than that one.. Thanks again!

[DPSS]

If your scanners are tuned right and are 30k, it should look better up until 5 or 6 then it should go past optimal the other way and begin to 'look worse'.

You're right, the best setting seems to be 6. Sorry, I was in a bit of a hurry when I wrote my last post and I got a little mixed up.
My scanners are SP20's, which are rated at 20 kpps for the 20 degree angle I'm scanning the ilda test pattern at.

Adding blank delay usually does the opposite, if too much is added. Are you sure it's not a tail off the end of the circle? Where was the circle generated, anyway it might not have proper dwells at the start and end.

Well, really I just suposed the circle was being scanned clockwise. The line appears at the opposite end of the scanned circle than the tail. I tested it playing the Spaghetti show I mentioned earlier.

Domingo.

[drlava]

Here's how it looks with my projector with the sound card DAC system. I noticed that if I tuned the blanking offset to the ilda pattern, it made a tail on the 3rd circle but with the ilda test pattern blanking 'detuned' it looked like the attached photo.

Try out the attached ilda file with optimization off (you can put it in the Spaghetti test frames folder.) Start with small scaling and scale up till the arcs are just inside the circle markers. Have the driver blank delay set at 6 and post a photo of the result, if you are willing. This might help reveal blanking issues if you have any, and I'm interested to see what it looks like on your system.

[DPSS]

Where is the Test patterns folder for Spaghetti? I can't find it anyware.

Domingo.

[drlava]

It was a new feature starting in 1.8.1.1

If you don't have it you can still create a 'show' with 50fps then stretch the frame box out so this it will repeat.

[keeperx]

in the spaghetti folder there is a folder called test patterns.. drop any single frame ilda there and it is available as a test pattern