A signature array of digitally sampled audio is formed from segment(s) of the digitally sampled audio by counting the number of occurrences within the segment(s) in each of a plurality of value bands or slots, such as amplitude bands. The signature array undergoes a fuzzy comparison with signatures arrays in the database. If more than one potential match is found, a more precise comparison is made. In the case of compact discs (CDs), five second sample segments may taken from the beginning, middle and end of each track to detect, e.g., the amplitude of the digitally sampled audio on the CD. A CD signature array may be formed of approximately 2000 value bands or slots by accumulating the occurrence of signals within each slot for all of the sample segments of the CD.