Visual Scratch by Jesse Kriss is a realtime visualization of scratch DJ performance. Ms Pinky is used to get the velocity of the turntable into Max/MSP using a control record. Ms Pinky allows you to scratch an MP3, so the sound is routed out to the mixer, and then back into Max where volume & frequencies are analyzed. A second machine is used to output the Processing visuals. Jesse has previously created MaxLink, a method of communication between Max/MSP & Processing, used in the project Visual Scratch.

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(via processing.org)