Automatic arrangement of automatic accompaniment with accent position taken into consideration

An automatic accompaniment data creation method using a processor, the method comprising:

• a performance information acquiring step of sequentially acquiring performance information of music;
• a timing determining step of determining, based on the acquired performance information, whether a current time point coincides with an accent position of the music;
• a selection step of selecting accompaniment pattern data, from among a plurality of accompaniment pattern data, of an automatic performance to be executed together with the music based on the acquired performance information of music;
• and
• an accompaniment progress step of progressing the automatic accompaniment based on the selected accompaniment pattern data and creating automatic accompaniment data based on an accompaniment event included in the selected accompaniment pattern data and having a tone generation timing at the current time point,
• wherein, upon the timing determining step determining that the current time point coincides with the accent position, the:
• an extracting step of extracting, from the accompaniment pattern data, an accompaniment event whose tone generation timing arrives within a predetermined time range following the current time point;
• a shifting step of shifting the tone generation timing of the extracted accompaniment event to the current time point;
• and
• a creating step of creating the automatic accompaniment data based on the accompaniment event having the tone generation timing shifted to the current time point in the shifting step.

A non-transitory machine-readable storage medium storing a program executable by a processor to perform an automatic accompaniment data creation method, the method comprising:

• a performance information acquiring step of sequentially acquiring performance information of music;
• a timing determining step of determining, based on the acquired performance information, whether a current time point coincides with an accent position of the music;
• a selection step of selecting accompaniment pattern data, from among a plurality of accompaniment pattern data, of an automatic performance to be executed together with the music based on the acquired performance information of music;
• and
• an accompaniment progress step of progressing the automatic accompaniment based on the selected accompaniment pattern data and creating automatic accompaniment data based on an accompaniment event included in the selected accompaniment pattern data and having a tone generation timing at the current time point,
• wherein, upon the timing determining step determining that the current time point coincides with the accent position:
• an extracting step of extracting, from the accompaniment pattern data, an accompaniment event whose tone generation timing arrives within a predetermined time range following the current time point;
• a shifting step of shifting the tone generation timing of the extracted accompaniment event to the current time point;
• and
• a creating step of creating the automatic accompaniment data based on the accompaniment event having the tone generation timing shifted to the current time point in the shifting step.