Automatic Generation of Metrical Structure Based on GTTM

This paper describes an automatic system of music analysis based on the generative theory of tonal music (GTTM). The system works by acquiring the metrical structure of the music. The GTTM is considered one of the most promising theories of music in regard to computer implementation; however, no order is given for applying its rules and as a result, they frequently conflict with each other. To solve this problem, we introduced adjustable parameters, enabling us to assign priority to the rules. Our GTTM-based system makes it possible to construct hierarchical metrical structures in a top-down process using bottom-up detection of local metrical strength. Experimental results showed that after these parameters were tuned, our method outperformed the baseline performance.