SOUNDPAINTING is the live composing sign language for performers working in the medium of structured improvisation. The language was created by New York composer Walter Thompson in 1974 and has since then spread to many different countries. Its multidisciplinarity brings together musicians, dancers, actors, poets, and visual artists. At present the language comprises over 1200 gestures that are signed by the composer/conductor indicating the type of material desired of the performers. Soundpainting is a sculpting tool. It allows a conductor to shape group improvisations in real time.