PROBLEM TO BE SOLVED: To make it possible to conduct performance teaching to music based on the music data received via a communication means such as the Internet.;SOLUTION: A personal computer 2 receives image data of music and music data containing musical sound data of the music from a music data server 4 via a network 3 and stores them in a HD, and makes a display part display the music thereon based on the image data read from the HD, and reads the musical sound data for performance teaching corresponding to the music displayed on the display part from the HD and outputs the data to a keyboard device 1 for guiding keys to be played.;COPYRIGHT: (C)2001,JPO
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