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	Musical Key Detection	音楽における調和解析
分野	音楽情報検索	音楽情報検索
系統	Machine learning	Machine learning
提唱年	2006	2002
提唱者	Emilia Gómez	Bryan Pardo
種類	Tonal center estimation	Harmonic function and progression analysis
原典	Gómez, E. (2006). Tonal description of polyphonic audio for music content processing. In INESC Porto PhD Thesis.	Pardo, B., & Birmingham, W. P. (2002). Algorithms for chordal analysis. Computer Music Journal, 26(4), 27-49.
別名	key recognition, tonality estimation, musical center detection	functional harmony analysis, harmonic progression detection, tonal function estimation
関連	5	5
概要	Musical key detection is the task of automatically determining the key (tonal center) and scale mode of a musical composition from its audio. Introduced formally by Gómez (2006), it is essential for music analysis, transposition, harmonic understanding, and music theory education. The key defines the tonal center around which a piece gravitates; identifying it enables deeper structural understanding. Key detection is closely related to chord recognition but operates at a higher level of abstraction.	Harmonic analysis is the computational study of chord progressions, harmonic function, and tonal relationships in music. Formalized for audio by Pardo and Birmingham (2002), it goes beyond simple chord identification to interpret harmonic role and structure. Harmonic analysis is essential for music theory education, compositional understanding, and music generation systems. It requires understanding both the chords themselves and their functional relationships within a tonal context.