Patent ID: 7895517

Claim:
An electronic musical apparatus comprising: a storage device storing (a) a text data file containing only text-formatted character data representative of characters to be displayed and (b) a performance data file containing (i) performance data representative of a musical piece for reproducing thereof and (ii) a display mode control command for controlling a display mode of displaying the characters represented by the character data, the display mode control command containing font specifying data that specifies all available fonts for displaying the characters represented by the stored character data; a microprocessor coupled to a memory, wherein the microprocessor is programmed to: read the stored performance data file and reproduce the musical piece in accordance with the read performance data; calculate in advance and store, for each of the all available fonts, the total number of pages required when all the characters represented by the character data contained in the stored text data file are displayed on the display unit in each of the all available fonts; display on a display unit the characters represented by the character data contained in the stored text data file in accordance with the reproduction of the musical piece; display on the display unit the total number of pages for the selected font, when one of the all available fonts is selected; and control the display mode for displaying the characters in response to the display mode control command, which specifies the appearance of the characters, contained in the stored performance data file.