Here is a snapshot of an Isadora patch I made last night using Isadoras Blob tracking "actors" to manipulate live sound and video by moving an object around in front of my webcam.
I connected the tracked objects vertical position to a send note "actors" pitch and the horizontal position to the notes velocity. SO when you move the object up and down pitch goes up and down and when you move it left and right the volume increases or decreases. I also added a sound watcher "actor" and connected the volume output to the size parameter of a dots effect "actor" and lastly connected this to the video input of a projector "actor". SO when you view stages you get a live video feed with the "dots" effect applied and the louder the notes being played get, the bigger and more spaced out the dots in the video get.
It was really super simple and you have any questions please post to comments
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