High discrimination performance neurons are more numerous in subcortical structures than in auditory cortex in original conditions. A, B, Cumulative percentage of the neuronal discrimination performance obtained in original vocalizations assessed by MIIndividual (in bits; A) and MIPopulation (in bits; B) with populations of nine simultaneous multiunit recordings in CN (in black), CNIC (in green), MGv (in orange), A1 (in blue), and VRB (in purple).