Messa di Voce is an installation of 2003 by Golan Levin with Zachary Lieberman, Jaap Blonk and Joan La Barbara which augments the speech, shouts and songs produced by a pair of virtuoso vocalists with real-time interactive visualizations.

The project touches on themes of abstract communication, synaesthetic relationships, cartoon language, and writing and scoring systems, within the context of a sophisticated, playful, and virtuosic audiovisual narrative. Messa di Voce lies at an intersection of human and technological performance extremes, melding the unpredictable spontaneity and extended vocal techniques of human improvisers with the latest in computer vision and speech analysis technologies. Utterly wordless, yet profoundly verbal, Messa di Voce is designed to provoke questions about the meaning and effects of speech sounds, speech acts, and the immersive environment of language.