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  4. Chord Types and Figuration: A Bayesian Learning Model of Extended Chord Profiles
 
research article

Chord Types and Figuration: A Bayesian Learning Model of Extended Chord Profiles

Finkensiep, Christoph  
•
Ericson, Petter  
•
Klassmann, Sebasian
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January 1, 2025
Music and Science

Making sense of a musical excerpt is an acquired skill that depends on previous musical experience. Having acquired familiarity with different types of chords, a listener can distinguish tones in a musical texture that outline these chords (i.e., chord tones) from ornamental tones such as neighbor or passing notes that elaborate the chord tones. However, music-theoretical definitions of chord types usually only mention chord tones, excluding typical figurations. The aim of this project is to investigate (i) how knowledge about (chord-specific) figurations can be incorporated into characterizations of chord types and (ii) how these characterizations can be acquired by the listener. To this end, we develop a computational model of chord types that distinguishes chord tones and “figuration tones” and can be learned using Bayesian inference following methods in computational cognitive science. This model is trained on two datasets using Bayesian variational inference, comprising scores of Western classical and popular music, respectively, and containing harmonic annotations as well as heuristically determined note-type labels. We find that the proposed characterization of chords is indeed learnable and the specific inferred profiles match previous music-theoretic accounts. In addition, we can observe patterns in the use of figuration, such as the distribution of figuration tones being related to the diatonic contexts in which chords appear and chord types differing in their predisposition to generate non-chord tones. Moreover, the differences in figuration distributions between the two corpora indicate style-specific peculiarities in the role and usage of figurations. The different patterns of typical figuration tones for specific chord types indicate that harmony and figuration are not independent.

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Type
research article
DOI
10.1177/20592043241291661
Scopus ID

2-s2.0-85215596057

Author(s)
Finkensiep, Christoph  

École Polytechnique Fédérale de Lausanne

Ericson, Petter  

École Polytechnique Fédérale de Lausanne

Klassmann, Sebasian

Universität zu Köln

Rohrmeier, Martin  

École Polytechnique Fédérale de Lausanne

Date Issued

2025-01-01

Published in
Music and Science
Volume

8

Subjects

Bayesian modeling

•

Bayesian perception

•

chord profiles

•

figuration

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harmony

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music cognition

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music perception

Editorial or Peer reviewed

REVIEWED

Written at

EPFL

EPFL units
DCML  
Available on Infoscience
January 30, 2025
Use this identifier to reference this record
https://infoscience.epfl.ch/handle/20.500.14299/246036
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