[PD] Using GEM for a music visualizer

beau djcypod at gmail.com
Sun Jan 13 06:35:07 CET 2008

There was a glsl kaleidoscope sent out the list a few months ago, it
should work a little faster. I usually use midi instead of audio to
controle gem. You also might try resizing your image to 512x512 for
better processor performance

On Jan 12, 2008 8:04 PM, Ross Mulcahy <ross.mulcahy at gmail.com> wrote:
> Hey all,
> I am trying to use GEM (on OSX), in particular pix_kaleidoscope, to
> manipulate an image in real time based on a wav file currently playing
> from an array. It is meant to be a very basic visualizer which needs to
> be "wound up", i.e. periodically the music runs out like a wind up music
> box and the user must rotate the mouse around the screen and click the
> screen for the visualizer to continue!
> OK now here is the problem when i call pix_kaleidoscope and it starts
> manipulating the image it starts using up 50% of my processor and the
> music gets all jumpy and the image changes are not smooth at all. Is
> there a way around this or a simpler, less processor hungry, method of
> manipulating the image for the same visual effect?
> I have uploaded my patch to the following address for your perusal:
> http://www.thehappydude.net/audio5.pd
> If anyone could lend me their experience here it would be much appreciated.
> Thanks
> R.
> By the way I only started using PD in November so my knowledge is limited!
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