In this program, each bubble has a note (in C major) associated with it. When a silhouette in the video feed overlaps with the bubble, the note is sent to an audio program (Reason, in this case) in the form of a midi note. The bubbles can be moved left and right using an Arduino equipped with an accelerometer.

Processing Code

Similar to the above, but now two video feeds are incorporated. Now bubbles can only be played if they overlap with red sections of the video. Red sections are created when two silhouettes from separate video feeds overlap, so cooperation between people in the two video feeds is necessary to create notes. 

Processing Code

Both these programs build on the programs from my previous two posts.