Automatic performance technique using audio waveform data

A computer-implemented method for executing an automatic performance by use of waveform data stored in a storage section, the storage section also storing therein:

• reference position information indicative of reference positions, in the waveform data, corresponding to reference timing;
• and correction position information indicative of correction positions in the waveform data that are different from the reference positions, said method comprising:
• a step of advancing the reference timing in accordance with passage of time;
• a reproduction step of reproducing the waveform data, stored in the storage section, in accordance with the passage of time;
• a measurement step of, in response to arrival of the reference timing, evaluating a deviation between a current reproduction position of the waveform data currently reproduced by said reproduction step and the reference position indicated by the reference position information;
• and
• a step of, in response to the current reproduction position of the waveform data arriving at the correction position indicated by the correction position information, correcting the current reproduction position of the waveform data, currently reproduced by said reproduction step, in accordance with the deviation evaluated by said measurement step.

A non-transitory computer-readable medium containing a program for causing a processor to perform a computer-implemented method for executing an automatic performance by use of waveform data stored in a storage section, the storage section also storing therein:

• reference position information indicative of reference positions, in the waveform data, corresponding to reference timing;
• and correction position information indicative of correction positions in the waveform data that are different from the reference positions, said method comprising:
• a step of advancing the reference timing in accordance with passage of time;
• a reproduction step of reproducing the waveform data, stored in the storage section, in accordance with the passage of time;
• a measurement step of, in response to arrival of the reference timing, evaluating a deviation between a current reproduction position of the waveform data currently reproduced by said reproduction step and the reference position indicated by the reference position information;
• and
• a step of in response to the current reproduction position of the waveform data arriving at the correction position indicated by the correction position information, correcting the current reproduction position of the waveform data, currently reproduced by said reproduction step, in accordance with the deviation evaluated by said measurement step.