Why do humans make music? Theories of the evolution of musicality have focused mainly on the value of music for specific adaptive contexts such as mate selection, parental care, coalition signaling, and group cohesion. Synthesizing and extending previous proposals, we argue that social bonding is an overarching function that unifies all of these theories, and that musicality enabled social bonding at larger scales than grooming and other bonding mechanisms available in ancestral primate societies. We combine cross-disciplinary evidence from archeology, anthropology, biology, musicology, psychology, and neuroscience into a unified framework that accounts for the biological and cultural evolution of music. We argue that the evolution of musicality involves gene-culture coevolution, through which proto-musical behaviors that initially arose and spread as cultural inventions had feedback effects on biological evolution because of their impact on social bonding. We emphasize the deep links between production, perception, prediction, and social reward arising from repetition, synchronization, and harmonization of rhythms and pitches, and summarize empirical evidence for these links at the levels of brain networks, physiological mechanisms, and behaviors across cultures and across species. Finally, we address potential criticisms and make testable predictions for future research, including neurobiological bases of musicality and relationships between human music, language, animal song, and other domains. The music and social bonding hypothesis provides the most comprehensive theory to date of the biological and cultural evolution of music.

/pdf/music-as-a-coevolved-system-for-social-bonding-59cxv3huzt.pdf

Music as a coevolved system for social bonding

Uncertainty and Surprise Jointly Predict Musical Pleasure and Amygdala, Hippocampus, and Auditory Cortex Activity

Music frequently elicits intense emotional responses, a phenomenon that has been scrutinized from multiple disciplines that span the sciences and arts. While most people enjoy music and find it rewarding, there is substantial individual variability in the experience and degree of music-induced reward. Here, we review current work on the neural substrates of hedonic responses to music. In particular, we focus the present review on specific musical anhedonia, a selective lack of pleasure from music. Based on evidence from neuroimaging, neuropsychology, and brain stimulation studies, we derive a neuroanatomical model of the experience of pleasure during music listening. Our model posits that hedonic responses to music are the result of connectivity between structures involved in auditory perception as a predictive process, and those involved in the brain's dopaminergic reward system. We conclude with open questions and implications of this model for future research on why humans appreciate music.

Musical anhedonia and rewards of music listening: current advances and a proposed model

The contrast between consonance and dissonance is vital in making music emotionally meaningful. Consonance typically denotes perceived agreeableness and stability, while dissonance disagreeableness and a need of resolution. This study addresses the perception of consonance/dissonance in single intervals and chords with two empirical experiments conducted online. Experiment 1 explored the perception of a representative sample of intervals and chords to investigate the overlap between the seven most used concepts (Consonance, Smoothness, Purity, Harmoniousness, Tension, Pleasantness, Preference) denoting consonance/dissonance in all the available (60) empirical studies published since 1883. The results show that the concepts exhibit high correlations, albeit these are somewhat lower for non-musicians compared to musicians. In Experiment 2 the stimuli’s cultural familiarity was divided into three levels, and the correlations between the key concepts of Consonance, Tension, Harmoniousness, Pleasantness, and Preference were further examined. Cultural familiarity affected the correlations drastically across both musicians and non-musicians, but in different ways. Tension maintained relatively high correlations with Consonance across musical expertise and cultural familiarity levels, making it a useful concept for studies addressing both musicians and non-musicians. On the basis of the results a control for cultural familiarity and musical expertise is recommended for all studies investigating consonance/dissonance perception.

/pdf/cultural-familiarity-and-musical-expertise-impact-the-5e714jaold.pdf

Cultural familiarity and musical expertise impact the pleasantness of consonance/dissonance but not its perceived tension

Consonance and dissonance perception. A critical review of the historical sources, multidisciplinary findings, and main hypotheses.

Western musical styles use a large variety of chords and vertical sonorities. Based on objective acoustical properties, chords can be situated on a dissonant-consonant continuum. While this might to some extent converge with the unpleasant-pleasant continuum, subjective liking might diverge for various chord forms from music across different styles. Our study aimed to investigate how well appraisals of the roughness and pleasantness dimensions of isolated chords taken from real-world music are predicted by Parncutt’s established model of sensory dissonance. Furthermore, we related these subjective ratings to style of origin and acoustical features of the chords as well as musical sophistication of the raters. Ratings were obtained for chords deemed representative of the harmonic language of three different musical styles (classical, jazz and avant-garde music), plus randomly generated chords. Results indicate that pleasantness and roughness ratings were, on average, mirror opposites; however, their relative distribution differed greatly across styles, reflecting different underlying aesthetic ideals. Parncutt’s model only weakly predicted ratings for all but Classical chords, suggesting that listeners’ appraisal of the dissonance and pleasantness of chords bears not only on stimulus-side but also on listener-side factors. Indeed, we found that levels of musical sophistication negatively predicted listeners’ tendency to rate the consonance and pleasantness of any one chord as coupled measures, suggesting that musical education and expertise may serve to individuate how these musical dimensions are apprehended.

/pdf/the-pleasantness-of-sensory-dissonance-is-mediated-by-3u6vz9hx27.pdf

The pleasantness of sensory dissonance is mediated by musical style and expertise.

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The pleasantness of sensory dissonance is mediated by musical style and expertise.