First results from a feedback patch I made last night using Gem. It's based on a patch that was posted on the list recently, unfortunately it escapes me who made it exactly...

Anyway, check it out. Not a finished piece by any means but just a taste of what's possible when playing with video feedback and audio response patches in Gem.

(If anyone wants the patch to play with, I can provide it. You can also just search the pd-list archives for recent posts on the subject of feedback in PDP and Gem)

http://understolenstreetlights.blogspot.com/2009/04/pd-video-feedback-patch-sketch.html

I would love to see the patch, i am doing similar stuff in Gem, although I am interested to see your audio interaction.....

-Evan_

that, my friend, was brilliant. definately post up the patch.

Here's the patch.

It's almost completely un-annotated so good luck sorting it out.

The audio response is really straightforward, I just hacked it in from an older patch of mine to test the feedback stuff. I think it's just reading the second outlet of [bonk~] without any modification. If you want to have the visual respond continuously to the audio or at a steady rate you can use the "fire bonk" or "(faster)" toggles. The first bangs [bonk~] at a rate set by a [metro], the second uses [gemhead] as a continuous metro.

Generally I use Jack to route audio from itunes into pd.

If you have any questions let me know and I'll tell you what I know.

http://www.pdpatchrepo.info/hurleur/myfeedback.pd

Oh, by the way. The patch above is a variation of the version used in the video, so don't expect the same exact results. I actually have a video of the above patch's output that I'll upload to youtube tonight. I'll post a link on this thread when it's live.

I've attached the patch that this is based on (I believe it was made by Derek Holzer, and sent to me by him via the PD mailing list).

Anyway, it's super helpful.

http://www.pdpatchrepo.info/hurleur/feedback_filterXYZ-help.pd

Here's a new video of my latest feedback patch in action (the one listed above, called "myfeedback.pd")

http://understolenstreetlights.blogspot.com/2009/04/pd-red-video-feedback.html