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scrolling spectral anaylizer

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Rod Kesselringscrolling spectral anaylizer
by on Sep 14, 2009 at 4:30:34 am

Hey guys, trying to recreate this type of effect and was wondering where I could start.

Please see example
http://www.istockphoto.com/stock-video-9304255-eq-arena-white.php

any help would be greatly appreciated


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Dave LaRondeRe: scrolling spectral anaylizer
by on Sep 14, 2009 at 5:32:33 pm

The whole thing? LED's bouncing on a cylindrical surface, which LOOPS to boot?

Dave LaRonde
Sr. Promotion Producer
KCRG-TV (ABC) Cedar Rapids, IA


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Rod KesselringRe: scrolling spectral anaylizer
by on Sep 14, 2009 at 8:53:12 pm

Dave you are so correct. Sorry should have been more clear. I found a font that does the bars and I worked out a random generation of the led's bouncing. by using an array and random generator. but getting it to loop and the cylindrical surface idea is still stumping me. I don't know if the way I generated the LED's was the best method for that tyoe of animation to make loop able. but that is what i have so far. Thanks for the response. Any help would be great.


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Dave LaRondeRe: scrolling spectral anaylizer
by on Sep 14, 2009 at 9:50:06 pm

For the curved surface, try CC Cylinder: I'm pretty sure you can set it to display just the inside of a cylinder.

Ah, the looping... you may have to intervene in the expression -- or split layers and keyframe by hand -- to ensure that the LED's are bouncing at the same speed and in the same direction at the time you designate as the loop point as they were at the first frame. As you probably know, that ain't no easy trick.

Dave LaRonde
Sr. Promotion Producer
KCRG-TV (ABC) Cedar Rapids, IA


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Rod KesselringRe: scrolling spectral anaylizer
by on Sep 14, 2009 at 10:59:00 pm

Dave,

Thanks CC Cylinder did the trick It actually works really well. the only issue I have now is the bouncing LED's are bouncing to fast. I need some way to slow it down. the LED's change every frame I would love to see if I could slow that process down. Any ideas?

the formula I am using is on a text layer and it is very simple.

alphabet="DEFGHIJ";
alphabet[Math.floor(random(alphabet.length-1))];

this is in a precomp that I then duplicate several times and time remapped so they all start at a different point.



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Dave LaRondeRe: scrolling spectral anaylizer
by on Sep 14, 2009 at 11:27:10 pm

Hmmmm.... you'd better ask somebody else. When confronted with an expression, I get that deer-in-the-headlights look on my face.

Dave LaRonde
Sr. Promotion Producer
KCRG-TV (ABC) Cedar Rapids, IA


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Dave LaRondeRe: scrolling spectral anaylizer
by on Sep 14, 2009 at 11:30:58 pm

Well, on second thought, you COULD put the expression layers in a comp with one-half or one-third the frame rate. For example, you can make the comp's frame rate "29.97 / 2"... and AE does the arithmetic. Cool! You'll have to double-check Preferences to make sure that the "Preserve frame rate of nested items" (or however it's phrased) thingie is checked on.

Whew... dodged another expressions bullet!

Dave LaRonde
Sr. Promotion Producer
KCRG-TV (ABC) Cedar Rapids, IA


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Rod KesselringRe: scrolling spectral anaylizer
by on Sep 15, 2009 at 12:00:13 am

Excellent!! I saw something about that somewhere but forgot it. It worked like a charm. Thanks so much for the help.


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david bogieRe: scrolling spectral anaylizer
by on Sep 15, 2009 at 3:49:08 pm

FxFactory has several freebies that do fabulous LED displays.
See:
http://www.noiseindustries.com/fxfactory/?gclid=COnc0-H485wCFR5HagodfF70kA

and look for CoreMelt.

Ooops, just noticed that coreMelt no longer offers their freebies with the FxFactory download package. Looks like they've gone completely commercial. which is fine, their VeeYou filer creates incredible meters of all kinds including analogs with needles and lots of LEDs.

bogiesan



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david bogieRe: scrolling spectral anaylizer
by on Sep 15, 2009 at 4:08:08 pm

There's an updated freebie! Man, you gotta get this thing, even if it doesn't suit your present need.

http://www.coremelt.com/products/downloads/download-veeyou.html

bogiesan



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david bogieRe: scrolling spectral anaylizer
by on Sep 15, 2009 at 4:19:25 pm

Shoot dudes, there's a CoreMelt forum right here on the Cow!

http://forums.creativecow.net/coremelt

bogiesan



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