To enable effective learning assistance for score reading to be performed by converting musical symbols such as musical notes appearing on a musical score displayed by a display means by a musical performance data converting means into musical performance data according to symbol data of the symbols and position coordinate data on the musical score.

A display means 2 displays data, including symbol data and position coordinate data stored in a musical score data storage means 1, (on a musical score) according to the data. An editing means 3 edits the data including the symbol data and position coordinate data by insertion, deletion, and modification and a musical score notation protocol by setting, modification or the like, on the musical score display of the display means 2 and stores the results in the musical score data storage means 1. A musical performance data converting means 4 performs conversion into musical performance data according to the data including the symbol data and position coordinate data stored in the musical score data storage means 1. A syllable name sound data generating means 5 generates syllable name sound data for syllable name sound from the musical performance data.