| CPC G06F 16/683 (2019.01) [G06F 16/65 (2019.01); G06F 16/686 (2019.01); G10H 1/0008 (2013.01)] | 11 Claims |
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1. An audio analysis method realized by a computer, the audio analysis method comprising:
acquiring an audio signal representing performance sounds of a musical piece;
calculating a calculated feature value by analyzing the audio signal, the calculated feature value including a degree of certainty for each of a plurality of music categories indicating the degree of certainty that the musical piece belongs to the music category; and
selecting, from among a plurality of candidate musical pieces, one or more candidate musical pieces whose feature value is similar to the calculated feature value based on the degree of certainty of the calculated feature value,
the calculating of the calculated feature value including
calculating a unit feature value that includes the degree of certainty that the musical piece belongs to each of the plurality of music categories for each of a plurality of unit time intervals obtained by dividing the audio signal on a time axis, and
calculating the calculated feature value by finding a mean of unit feature values for two or more unit time intervals of the plurality of unit time intervals.
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