Machine Discoveries: A Few Simple, Robust Local Expression Principles

The paper presents a new approach to discovering general rules of expressive music performance from real performance data via inductive machine learning. A new learning algorithm is briey presented, and then an experiment with a very large data set (performances of 13 Mozart piano sonatas) is described. The new learning algorithm succeeds in discovering some extremely simple and general principles of musical performance (at the level of individual notes), in the form of categorical prediction rules. These rules turn out to be very robust and general: when tested on performances by a dierent pianist and even on music of a dierent style (Chopin), they exhibit a surprisingly high degree of predictive accuracy.