http://createdigitalmusic.com/index.php?option=com_content&task=view&id=540

LITERAL:
Here’s even more open source code for creating new sound interfaces using free-moving blocks for control. We looked at Sonicforms, which is both intended as a project and a repository for information. Chris’ project uses a projector aimed at a tabletop for additional feedback, and IR lights for sensing. That adds cost to the system and makes it less portable (though it does provide a cooler visual interface.)
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