Rhythm Pattern Accuracy Diagnosis System Capable of Objective Evaluation and Commentary Feedback(Regular Section)

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概要

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• This paper describes a rhythm pattern accuracy diagnosis system based on the rhythm pattern matching algorithm and a diagnosis feedback method by employing the SVM technique. A beat rhythm pattern is recorded by a PC and analyzed with an algorithm including cluster-analysis-based pattern matching. Rhythm performance is represented by a performance feature vector, which features note length deviation, note length instability, and tempo instability. The performance feature vector is effective for objectively evaluating the accuracy of rhythm patterns objectively. In addition, this system has the music experts' knowledge base, which is calculated from the performance feature vectors associated with the experts' subjective evaluation by listening to the performance. The system generates both an objective measuring report, and experts' comments for learners. Reproductivity of experts' comments is statistically indicated to be excellent for eight rhythm patterns, two tempo levels, and eight users. Reliability of experts' comments are also described considering the threshold of the decision function of SVM. Subjective evaluation of the system is carried out by fifteen users by a questionnaire using the SD method. As a result of factor analysis for the sixteen questions, four factors named "Audio-visual representation," "User-friendliness," "Reliability," and "Window representation," are extracted. Users' four factor scores indicate that the system is reliable and easy to use.

• 2003-01-01

著者

• Nishikata Atsuhiro

  Center For Research And Development Of Educational Technology (cradle) Tokyo Institute Of Technology

• YONEKAWA Takahiro

  Graduate School of Decision Science and Technology, Tokyo Institute of Technology

• Yonekawa Takahiro

  Graduate School Of Decision Science And Technology Tokyo Institute Of Technology

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