A method and apparatus for outputting audio data and a musical score image, displaying a musical score image corresponding to reproduced audio data, and outputting audio data corresponding to a musical score image are provided, in which a tone is extracted, the tone is converted into a frequency, a monotone or polyphonic tone is identified, the frequency corresponding to a monotone or polyphonic tone is converted into tone information data, and the tone information data is stored, and a musical score is displayed. Also, audio data corresponding to a musical score are output, in which the musical score is photographed, musical signs from the photographed musical score are extracted, a pitch of a tone is extracted from music paper and musical note information of the musical signs, a duration of the tone from the musical note information of the musical signs is extracted, and audio data are output.