Abstract
In the realm of data analysis, traditional statistical methods often struggle when faced with ambiguity and uncertainty inherent in real world data. Uncerainty theory, developed to better model and interpret such data, offers a promising alternative to conventional techniques. In this paper, we establish logistic regression models to initiate music statistics based on uncertainty theory. In particular, we will classify the music into different types named Baroque, Classical, Romantic, and Impressionism based on four characteristics: harmonic complexity, rhythmic complexity, texture complexity, and formal structure, with the help of the uncertain logistic models proposed. This theoretical framework for music classification provides a nuanced understanding of how music is interpreted under conditions of ambiguity and variability. Compared with the probabilistic counterpart, our approach highlights the versatility of uncertainty theory and provides researchers one much more feasible method to analyze the often-subjective nature of music reception, as well as broadening the potential applications of uncertainty theory.
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All the codes implemented during this study are available from the corresponding author on reasonable request.
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Funding
This work was support by supported by the National Natural Science Foundation of China (Grant No. 11901145).
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Appendices
Appendix A Index Explanation
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(i)
Harmonic Complexity(HC)
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(a)
Level 1: Basic diatonic harmony, predominately using primary chords (I, IV, V). Minimal chromaticism or modulation.
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(b)
Level 2: Simple diatonic progressions with occasional secondary dominants and modulations to closely related keys. Some use of non-diatonic chords.
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(c)
Level 3: Moderate use of chromaticism, including secondary dominants, modal interchange, and more frequent modulations to related and distant keys. Begins to explore altered chords.
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(d)
Level 4: High use of chromaticism, including complex chord substitutions, frequent modulations including to distant keys, and extensive use of non-traditional harmonies such as augmented sixth chords and altered chords.
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(e)
Level 5: Extremely complex harmonic language, extensive use of dissonance, atonality, polytonality, or serialism. Frequent use of highly chromatic or completely non-diatonic structures.
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(a)
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(ii)
Rhythmic Complexity(RC)
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(a)
Level 1: Very simple and repetitive rhythms, predominantly using basic note values like whole, half, and quarter notes without syncopation.
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(b)
Level 2: Includes some rhythmic variety and mild syncopation. Use of dotted notes and ties, still primarily straightforward rhythms.
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(c)
Level 3: Moderate rhythmic complexity with more frequent use of syncopation, compound meters, and some asymmetrical meters. Varied rhythmic patterns and combinations.
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(d)
Level 4: Complex rhythms involving frequent syncopation, mixed meter, and irregular meters. Use of complex tuplets and intricate rhythmic layering.
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(e)
Level 5: Extremely complex rhythmic structures, extensive use of polyrhythms and polymeters, advanced syncopation, and frequent changes in time signature. Complex cross-rhythms common.
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(a)
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(iii)
Texture Complexity(TC)
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(a)
Level 1: Predominantly monophonic texture. Single melodic line without accompaniment or only minimal accompaniment.
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(b)
Level 2: Simple homophonic texture, featuring a clear melody with chordal accompaniment. Limited counterpoint or polyphony.
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(c)
Level 3: Textural variety including homophony and polyphony. Use of counterpoint may be more evident. Some layers or independent lines might be introduced.
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(d)
Level 4: Rich polyphonic or heterophonic textures, with multiple independent lines interweaving. Complex counterpoint common, with significant interaction between lines.
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(e)
Level 5: Extremely dense and complex textures, extensive use of polyphony, counterpoint, and/or heterophony. May include layered textures using modern techniques and electronic effects.
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(a)
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(iv)
Formal Structure(FS)
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(a)
Level 1: Very simple structures such as strophic form or basic binary or ternary forms. Minimal development or thematic transformation.
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(b)
Level 2: Clear forms such as standard binary, ternary, or simple sonata/rondo forms with some thematic development and clear sectional divisions.
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(c)
Level 3: More complex forms with developed themes, such as sonata form with moderate development sections, theme and variations, or compound ternary forms.
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(d)
Level 4: Advanced structures with extensive development and transformation of material. Includes complex sonata forms, through-composed forms, or intricate rondo forms.
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(e)
Level 5: Highly sophisticated structural forms that may include large-scale cyclic forms, innovative or avant-garde structures, or highly integrative forms that blur traditional boundaries.
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(a)
Appendix B Data set
The data used in this paper will be provided in the following tables.
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Lu, J., Zhou, L., Zeng, W. et al. Music statistics: uncertain logistic regression models with applications in analyzing music. Fuzzy Optim Decis Making 23, 637–654 (2024). https://doi.org/10.1007/s10700-024-09436-8
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DOI: https://doi.org/10.1007/s10700-024-09436-8