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This data set contains extra-cellular electrophysiological recordings from 6 urethane anesthetized adult zebra finches (Taeniopygia guttata), 4 males and 2 females. At each electrophysiological recording site a set of sounds was presented to the subject. This set was made from 10 ripple noise stimuli of 2 sec., and 20 songs of zebra finches and the vocalizations from the repertoire of 10 individuals. The maximum number of stimuli that could be selected in that procedure was 171. The average number of stimuli played for each single unit was 144. Ten trials were acquired for each stimulus with a few exceptions. Sounds were broadcasted in a random order. Neural responses were recorded using the signal of two (5 subjects) or one (1 subject) electrode arrays. When two electrode arrays were used, they were placed each in one hemisphere, targeting the following avian auditory cortical regions: Field L (including the thalamo recipient L2, the primary auditory regions L1 and L3), caudolateral and caudomedial mesopallium (CLM and CMM) and caudomedial nidopallium (NCM). Data contains spike times for 914 single auditory units from the 1401 auditory spike-sorted units of all our recordings. Additional details on these experiments can be found in: Elie JE and Theunissen FE. Meaning in the avian auditory cortex: Neural representation of communication calls. European Journal of Neuroscience. 2015. 41(5) 546-567. Elie JE and Theunissen FE. Invariant neural responses for sensory categories revealed by the time-varying information for communication calls. Plos Computational Biology. 2019.