English: Parcellation of the auditory cortex into core (left), medial and lateral belt (middle), and parabelt (right) based on individual (top) and group (bottom) data (CF is Characteristic Frequency). Solid black lines indicate boundaries between auditory fields based on maps of tonotopy, tuning width, or myelin. Dotted black lines indicate boundaries assumed based on literature, but for which no objective measure is available. White outlines indicate maps of myelin (left) or speech/voice selectivity (middle and right). The white arrows in the first column show the main direction of the frequency gradient within the three core fields. The inset in the panel “Group – Core” shows the primate model of auditory cortex as interpreted and adapted from Kaas and Hackett (2000). The model is rotated so that the core aligns with HG. Isofrequency gradients are color-coded to match the colorscale in our tonotopy maps.