A System for Evaluating Singing Enthusiasm for Karaoke

Evaluation of singing skill is a popular function of karaoke machines. Here, we introduce a different aspect of evaluating the singing voice of an amateur singer: “enthusiasm”. First, we investigated whether human listeners can evaluate enthusiasm consistently and whether the listener’s perception matches the singer’s enthusiasm. We then identified three acoustic features relevant to the perception of enthusiasm: A-weighted power, “fall-down”, and vibrato extent. Finally, we developed a system for evaluating singing enthusiasm using these features, and obtained a correlation coefficient of 0.65 between the system output and human evaluation.