A portable telephone apparatus has a communication unit for receiving a call signal to inform a user of an arrival of a call so that the user can start a talk, and a reproduction unit for processing music data in response to the call signal to reproduce a piece of music composed of two or more parts including a melody part and an accompaniment part so as to audibly notify the user of the arrival of the call. Allowing the user to compose music without need for an excessive amount of work, score data for a melody is inputted first (IN1), and style information and chord information are inputted in the process of creating an accompaniment part. Then, accompaniment data for drum, bass and chord parts are selected from a ROM 12 or RAM 11 based on the inputted style and chord information (SE1). The selected accompaniment data of two or more parts are merged with the score data of the melody (PR1) to create music data. The created music data is stored in an original music data area of the RAM 11, and reproduced at the time of arrival of a call.