Midi out from Quartz Composer

After the episode with color tracking patches, I started working on a composition that would take video input from a webcam and detect flashes of light at certain predefined points in the picture. I wanted a different midi note to be assigned to each of the points. So that when a flash is detected the associated midi note would be sent out to a synth or sampler.

The only problem is that the midi patches that ship with QC are pretty lame, and didn’t allow me to do what I wanted. After searching around for a bit, I found the kineme project. Their midi patches are apparently quite beta, and you have to register on the site to be able to access them. I actually had to try a few different builds before I found one version where the Global Output Midi Note -patch wasn’t broken. Be sure to put the files in the right folder; the midi patches go in /Library/Graphics/Quartz Composer Patches, not -Plug-Ins.

When registered, the midi patches can be found through the link below:
http://kineme.net/QuartzComposerPatches/MIDITools/category

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