Rethinking 'Open Form'

This paper approaches the idea of a musical work whose polyvalent form is constituted by its randomly generated tempo structure. For this kind of music the original concept of 'open form' is extended by the use of a computer algorithm that not only generates an aleatory collage of prepared fragments, but also calculates an appropriate tempo progression to arrange and overlap these fragments in a musically meaningful way. The author's collaboration with a chamber music trio is presented and the artistic strategies and technical implementations are discussed