Figure 1.

(a) Pitch contour and intervals for two familiar melodies (top: Old MacDonald; bottom: Norwegian Wood). (b) Scales and intervals, described using the nomenclature of Western music (white circles—major scale; black circles—minor scale; circles with horizontal lines—Phrygian scale; circles with vertical lines—pentatonic scale). (c) Schematic description of the three tasks. Each plot depicts the stimuli for a single trial. (d) Schematic of stimulus used in brightness tasks, with two “notes” with different brightness values shown simultaneously. The frequency components composing the two “notes” were the same, but their amplitudes were altered, producing a shift in the spectral envelope.