This version provides new tools for the composition of serial music and a straightforward intuitive approach to the design of very sophisticated time structures. It is supplied with a new set of musical examples demonstrating the power of the new syntactic features. BP2 is fully AppleScript compatible. All features are documented in the built-in hypertext help. BP2 won the Bourges 1997 international award (ex aequo with "Cecilia") in the category of computer-aided composition and realization software.