Sixty right-handed non-musician subjects, thirty males and thirty females, and thirty right-handed musician subjects, seventeen males and thirteen females, were submitted to dichotically presented tonal sequences. Immediate identification procedure with preliminary training was used. The results point out that both, musicians and non-musicians, males and females, show significant left ear dominance. The left ear dominance was more frequent in musicians. The results are discussed in the light of the "analytic-synthetic" theory of Bever and Chiarello and the "temporal" theory of Gordon.