Tonal Description of Polyphonic Audio for Music Content Processing
INFORMS Journal on Computing · 2006 · Volume 18 · Issue 3
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 different temporal 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.
Keywords
tonal description, key estimation, content analysis and indexing, sound and music computing
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