The role of the face and mouth in speech production as well asnon-verbal communication suggests the use of facial action tocontrol musical sound. Here we document work on theMouthesizer, a system which uses a headworn miniaturecamera and computer vision algorithm to extract shapeparameters from the mouth opening and output these as MIDIcontrol changes. We report our experience with variousgesture-to-sound mappings and musical applications, anddescribe a live performance which used the Mouthesizerinterface.
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