A singing evaluation device (10) equipped with a consonant length measurement unit (11), a consonant length distribution creation unit (12), and an evaluation unit (13). The consonant length measurement unit (11) detects consonants in singing data and measures the length of each consonant. The consonant length distribution creation unit (12) stores, over a prescribed time period, the consonant lengths that have been input, and creates a frequency distribution for the consonant length. The evaluation unit (13) utilizes the fact that the singing is more in the groove when the variation in the consonant length is greater and the singing is less in the groove when the variation in the consonant length is less to determine whether the singing is in the groove. Specifically, the evaluation unit (13) calculates an index that is based on the variation in the consonant length, from the frequency distribution for the consonant length, and determines whether the singing is in the groove from the size of the index that is based on the variation in the consonant length.
SINGING EVALUATION DEVICE, SINGING EVALUATION METHOD, AND SINGING EVALUATION PROGRAM