Harmonic Visualizations of Tonal Music

Multi-timescale visualization techniques for displaying the output from key-finding algorithms are presented in this paper. The horizontal axis of the key graphs represents time in the score, while the vertical axis represents the duration of an analysis window used to select music for the key-finding algorithm. Each analysis window result is shaded according to the output key’s tonic pitch. The resulting diagrams can be used to compare differences between key-finding algorithms at different time scales and to view the harmonic structure and relationships between key regions in a musical composi-