Automatic Key Partition Based on Tonal Organization Information of Classical Music
نویسندگان
چکیده
Key information is a useful information for tonal music analysis. It is related to chord progressions, which follows some specific structures and rules. In this paper, we describe a generative account of chord progression consisting of phrase-structure grammar rules proposed by Martin Rohrmeier. With some modifications, these rules can be used to partition a chord symbol sequence into different key areas, if modulation occurs. Exploiting tonal grammar rules, the most musically sensible key partition of chord sequence is derived. Some examples of classical music excerpts are evaluated. This rule-based system is compared against another system which is based on dynamic programming of harmonic-hierarchy information. Using Kostka-Payne corpus as testing data, the experimental result shows that our system is better in terms of key detection accuracy.
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