Enhanced psychophysical and cochlear tuning observed in musicians is unlikely to be explained by mere differences in human cochlear length. A parsimonious account of our 2016 data is improved efferent feedback from the medial olivocochlear efferent system that adjusts masking and tuning properties of the cochlea and is subject to attentional modulation-all functions reported to be enhanced in musically trained ears. Still, new experiments are needed to tease out "nature" vs. "nurture" effects in music-related brain plasticity and move beyond cross-sectional studies and definitions of "musicians" based solely on self-report.
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