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Tonal description of polyphonic audio for music content processing

Title Tonal description of polyphonic audio for music content processing
Publication Type Journal Article
Year of Publication 2006
Authors Gómez, E.
Journal Title INFORMS Journal on Computing, Special Cluster on Computation in Music
Volume 18
Abstract We present a method to extract a description of the tonal aspects of music from polyphonic audio signals. We define this tonal description using different levels of abstraction, differentiating between low-level signal descriptors and high-level textual labels. We also establish diverse emporal scales for description, defining some features as being attached to a certain time instant, and other global descriptors as related to a wider segment. The description is validated by estimating the key of a piece. We also propose the description as a tonal representation of the polyphonic audio signal to measure tonal similarity between audio excerpts and to establish the tonal structure of a musical piece.