Musical score display control method, device and program

A musical score display controller comprising:

• a processor, programmed to
• acquire performance data being performed;
• sequentially acquire performance positions, including a current performance position, of a performance in a musical score data that represent a musical score based on the musical score data and the performance data;
• control a display to display a predetermined portion of the musical score data according to the current performance position acquired by the processor;
• control the display to display a next performance target portion of the musical score data, corresponding to a next performance target on the musical score data, upon the processor determining that the current performance position has advanced beyond a first threshold position from a prior performance position at a point in time in the musical score data prior to the current performance position;
• and
• control the display to display a previous performance target portion of the musical score data, corresponding to a previous performance target on the musical score data, upon the processor determining that the current performance position has returned beyond a second threshold position from the prior performance position.

A non-transitory computer-readable medium storing a musical score display control program that is executed by a computer to:

• acquire performance data being performed;
• sequentially acquire performance positions, including a current performance position, of a performance in a musical score data that represent a musical score based on the musical score data and the performance data;
• control a display to display a predetermined portion of the musical score data according to the current performance position acquired by the computer;
• control the display to display a next performance target portion of the musical score data, corresponding to a next performance target on the musical score data, upon the computer determining that the current performance position has advanced beyond a first threshold position from a prior performance position at a point in time in the musical score data prior to the current performance position;
• and
• control the display to display a previous performance target portion of the musical score data, corresponding to a previous performance target on the musical score data, upon the computer determining that the current performance position has returned beyond a second threshold position from the prior performance position.