Lexikon-Sonate is an interactive realtime composition environment for musical composition and live performances. It takes advantage of composition algorithms that has been developed by Karlheinz Essl since the 1980's. With this algorithmic music generator on can easily create fascinating and complex musical structures on the fly.

Lexikon-Sonate is an infinite music installation that can run on a computer for years without repeating itself. It can also be used as a computer instrument for live performances.