| 摘要 |
<P>PROBLEM TO BE SOLVED: To enable users to check whether the performance operation carried out by themselves with the tones having various degrees of loudness or softness according to performance operation forms is correct or wrong at all times. <P>SOLUTION: When the sound volume based on the sound volume control information acquired according to the operation forms of performance operators is smaller than the reference sound volume, the sound volume control information is so changed as to make the sound volume greater than the reference sound volume. A changing means changes the acquired sound volume control information so as to make the sound volume greater than the reference sound volume when the sound volume based on the sound volume control information meeting the operation forms of the performance operators acquired by an acquiring means is smaller than the reference sound volume set by a setting means. Then, the users can clearly listen to the tones produced according to the performance operation and are enabled to check whether the performance based on the performance operation carried out by themselves is correct or wrong by listening to the tones. <P>COPYRIGHT: (C)2004,JPO |
