Are there controversies in pitch and timbre perception research? [in 333 words]

European Starling (Sturnus vulgaris)

At the heart of human musicality lie fundamental questions about how we perceive sound. In the coming academic year our group will dedicate several meetings on exploring and clarifying the spectral percepts that might underlie musicality with an agenda set around some enduring controversies. These span the roles of learning, culture, and cross-species comparisons, as well as evolutionary explanations for why music holds such sway over human minds. 

Among the most debated topics is the relationship between pitch and timbre perception. Both pitch and timbre are percepts: mental constructs arising from acoustic input. In humans, pitch perception is central to melodic recognition. When we hear a melody, we tend to identify it by its sequence of relative pitches—hearing it as the “same” tune regardless of changes in timbre, loudness, or duration. This reliance on relative pitch is a cornerstone of human music cognition. 

But is pitch such a universal perceptual anchor? For years, researchers assumed so, pointing to songbirds as an obvious parallel. Birds, it was thought, must also use pitch cues, though often in the form of absolute rather than relative pitch. Yet recent evidence complicates this narrative. In a striking study, Bregman et al. (2016) reported that European starlings do not, in fact, rely on pitch when recognizing sequences of complex harmonic tones. Instead, they appear to attend more closely to spectral shape, or the broader distribution of energy across frequencies. 

This finding raises a further question: is it really the spectral envelope (i.e. spectral shape) that matters, or something more subtle? Because the methods used—particularly contour-preserving noise vocoding—leave open another possibility: birds may actually be attuned to fine spectral-temporal modulations, the intricate contours woven into sound. Such results remind us that perceptual categories humans take for granted may not map cleanly onto other species, and that the universality of pitch as a cognitive anchor remains an open, and fascinating, controversy (cf. Patel, 2017; ten Cate & Honing, 2025). 

N.B. These entries are part of a new series of explorations on the notion of Spectral Percepts (in 333 words each). 

Bregman, M. R., Patel, A. D. & Gentner, T. Q. (2016). Songbirds use spectral shape, not pitch, for sound pattern recognition. Proceedings of the National Academy of Sciences, 113(6), 1666–1671. doi: 10.1073/pnas.1515380113 

Patel, A. D. (2017). Why Doesn’t a Songbird (the European Starling) Use Pitch to Recognize Tone Sequences? The Informational Independence Hypothesis. Comparative Cognition & Behavior Reviews, 12, 19–32. doi: 10.3819/CCBR.2017.120003 

ten Cate, C. & Honing, H. (2025). Precursors of music and language in animals. In D. Sammler (Ed.), The Oxford Handbook of Language and Music. Oxford University Press. doi: 10.1093/oxfordhb/9780192894700.001.0001

Is consonance a biological or a cultural phenomenon? [in 333 words]

Chick in consonance experiment (Chiandetti & Vallortigara, 2011).

The distinction between consonance and dissonance has long occupied a central place in the scientific study of auditory perception and music cognition. Consonant intervals are typically described as stable, harmonious, or pleasing, whereas dissonant intervals are often characterized as tense, unstable, or even harsh. Yet even these seemingly straightforward descriptions quickly lead to methodological debate. 

A central difficulty arises from the frequent conflation of “dissonance” with “roughness.” Roughness refers to a physiological effect caused by closely spaced frequencies interacting on the basilar membrane of the inner ear. This phenomenon is measurable, consistent, and largely universal across listeners. Consonance, however, is not reducible to physiology alone. Recent research emphasizes that consonance is a multidimensional construct, shaped by both acoustic properties such as harmonicity and by layers of cognitive and cultural familiarity (Lahdelma & Eerola, 2020). 

This controversy can be framed around two major questions (Harrison, 2021). First, do humans possess an innate preference for consonance over dissonance? Second, if such a preference exists, how might it be explained in evolutionary terms? A landmark study by McDermott et al. (2016) with the Tsimane’, an Amazonian group minimally exposed to Western music, found no consistent preference for consonant over dissonant intervals. Their conclusion was that what many listeners call “pleasant” is primarily shaped by cultural experience. 

This interpretation has been vigorously challenged. Bowling et al. (2017) cite empirical evidence from human infants (Trainor et al., 2002) and even non-human animals (Chiandetti & Vallortigara, 2011) that points toward at least some innate, hardwired auditory sensitivity. If so, consonance may reflect evolutionary selective pressures, possibly related to the spectral composition of human vocalizations and the neurophysiological mechanisms underlying pitch perception and auditory scene analysis. 

In the end, consonance appears to be neither purely biological nor purely cultural. Our ears detect roughness and harmonicity, but our minds interpret these sensations through cultural frameworks. What sounds stable in one tradition may sound unfamiliar in another. The consonance controversy thus highlights music cognition as an intricate interplay between biology and culture. 

N.B. These entries are part of a new series of explorations on the notion of Spectral Percepts (in 333 words each).

References

Bowling, D. L., Hoeschele, M., Gill, K. Z. & Fitch, W. T. (2017). The nature and nurture of musical consonance. Music Perception, 118–121. 

Chiandetti, C. & Vallortigara, G. (2011). Chicks like consonant music. Psychological Science, 22(10), 1270– 1273. https://doi.org/10.1177/0956797611418244 

 

Harrison, P. M. C. (2021). Three Questions concerning Consonance Perception. Music Perception, 337–339. https://doi.org/10.1525/MP.2021.38.3.337 

 

Lahdelma, I. & Eerola, T. (2020). Cultural familiarity and musical expertise impact the pleasantness of consonance/dissonance but not its perceived tension. Scientific Reports, 10(1), 8693. https://doi.org/10.1038/s41598-020-65615-8 

 

McDermott, J. H., Schultz, A. F., Undurraga, E. A. & Godoy, R. A. (2016). Indifference to dissonance in native Amazonians reveals cultural variation in music perception. Nature, 25, 21–25. https://doi.org/10.1038/nature18635 

 

Trainor, L. J. & Unrau, A. (2012). Development of Pitch and Music Perception. In Human Auditory Development (pp. 223–254). Springer. https://doi.org/10.1007/978-1-4614-1421-6_8

What makes two melodies feel like the same song? [in 333 words]

(cf. Krumhansl, 1989).

One of the most intriguing questions in music cognition research is also one of the simplest: when are two melodies experienced as the same?

At first glance, the answer might seem obvious — they share the same notes, in the same order, with the same rhythm. But a closer look, across cultures and even across species, reveals a more complex picture. What our brains latch onto when recognizing a tune involves a web of spectral percepts — the fundamental features of sound that guide humans and other animals in interpreting auditory patterns. This may sound like a niche research topic, but it lies at the heart of debates about authorship, originality, and musical ownership.

Consider hearing a melody played in a different key or on an unfamiliar instrument. Most people can still recognize it. How is this possible? Explanations often point to intervallic structure — the sequence of pitch intervals between notes — the contour, which is the overall shape of a melody as it rises and falls, or timbre, often described as the “color” of sound, including brightness, texture, and loudness.

For decades, music research treated timbre as secondary — something layered over supposedly “meaningful” musical features like pitch and rhythm (cf. McAdams & Cunible, 1992). Increasing evidence now suggests timbre is not merely decorative but a core perceptual building block. Timbre may also support “relative listening,” the ability to track patterns of change across different features. Exploring it carefully could reveal flexible and universal aspects of music cognition previously underestimated.

Recognizing that humans and non-human animals may rely on different spectral cues is equally crucial for understanding music’s evolutionary roots. A melody meaningful to humans may not register as such for a zebra finch — and vice versa.

By broadening music cognition research to include timbre, spectral contour, and species-specific strategies, scientists hope to uncover the shared perceptual foundations of musicality. Such work moves us closer to answering a deceptively simple but deeply complex question: what truly makes two melodies feel like the same song?

N.B. These entries are part of a new series of explorations on the notion of Spectral Percepts (in 333 words each).

References

McAdams, S, & Cunible, J-C (1992). Perception of timbral analogies. Philosophical Transactions of the Royal Society B: Biological Sciences, 336, 383-389. 

Krumhansl, C. L. (1989). Why is musical timbre so hard to understand? In S. Nielzén & O. Olsson (Eds.), Structure and perception of electroacoustic sound and music (pp. 43– 53). Elsevier.