Abstract: A method for mixing effect sounds with a music data and storing/replaying the mixed music data using an auxiliary input device equipped at the mobile telephone is provided. The method includes extracting a direction and a displacement range of the auxiliary input device from an input signal, if the signal is input through the auxiliary input device while music data is replayed, applying effects corresponding to the extracted direction and input range to the music data, storing the music data with the applied effects in a temporary memory, and storing the music data with the applied effects as merged music data in a memory according to a user's commmand.