A computer-implemented method for identifying a user corresponding to an incoming call is provided. The method includes receiving an incoming call and decoding a phone number of the incoming call. The method further includes assigning one or more musical notes associated with one or more numbers in the phone number according to a musical note table and composing the corresponding musical notes of with the corresponding a predetermined music selection of a determined class to generate a ring music. The method further includes obtaining corresponding audio clip of each musical note of the ring music from the audio clip database and outputting the audio clips through a music output device.