The next example is Tag Magic's Visual Circus - Processing / PureData - Piece #1 live act by Jaime Munárriz + Esther Berdión.

Jaime Munárriz Ortiz (Madrid – Spain, 1963) is a professor at Universidad Complutense de Madrid teaching Digital Image, Interactive Processes, Video Projects, Stage Design, Multimedia.
Visual /Sonic Art piece is realized in PureData: Sound, Structure. Processing: Structure Visualisation, VJ.

http://www.youtube.com/watch?v=WNl9NoTD1jM&feature=related

For more info and visual experiments check out: http://tagmagic.wordpress.com/