(Top) Compared with nonmusicians (black), musicians (grey) have higher amplitudes for the harmonics of the upper tones of a musical chord (p <0.05, **p <0.01). Notably, this difference was not seen for the fundamental frequency. (Bottom) Musicians again have higher amplitudes in response to the complex portion of the baby’s cry compared with nonmusicians, but this enhancement was not seen in response to the periodic region of the response (**p <0.01). Modified from Lee et al, J Neurosci 200931; Strait et al, Eur J Neurosci 2009.26