Re: [PD] Using GEM for a music visualizer

[Derek Holzer]

Hi Ross,

Running GEM and PD for audio in the same instance isn't such a good 
idea. Better to keep the threads separate. Normally, if I want to use 
both together I run two different instances of PD, and communicate 
between them with OSC. One for the GEM and one for the audio. On OSX, 
you may have to start each PD instance from the command line:

/Applications/Pd-extended.app/Contents/Resources/bin/pd --noaudio --open 
GEM patch

/Applications/Pd-extended.app/Contents/Resources/bin/pd --nogui --open 
audio patch

should do the trick for with PD-extended. You could use the --nogui if 
all the controls are in the GEM patch. You could even make a shell 
script which opens both instances at once, with their respective patches.

best,
d.

Ross Mulcahy 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?


-- 
derek holzer ::: http://www.umatic.nl ::: http://blog.myspace.com/macumbista
---Oblique Strategy # 202:
Back up a few steps.
What else could you have done?

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Re: [PD] Using GEM for a music visualizer

[beau]

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 [EMAIL PROTECTED] 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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