Open Ended by Michael Cooke is a very versatile work that is composed live before your eyes and ears. Based on Rova‘s Radar techniques, Open Ended is less of a composition and more of a color or tool palette. It is an ever-growing collection of rules and games for the performers that are triggered by hand signals by the conductor/composer. The conductor/composer then composes the piece live using these hand signals to guide the performers. The ability to compose with what happens in the moment, in real time, is what is required to produce this piece. This similar to the “Soundpainting” language was created by Walter Thompson in Woodstock, New York in 1974. Open Ended has no set instrumentation and can be played by any number of performers. It also has no set length; the piece could last 5 minutes or 24 hours.