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Chord judging apparatus and chord judging method

  • US 10,410,616 B2
  • Filed: 08/15/2017
  • Issued: 09/10/2019
  • Est. Priority Date: 09/28/2016
  • Status: Active Grant
First Claim
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1. A chord judging method performed by a processor to judge chords of a musical piece whose data is stored in a memory, the method comprising executing, with the processor, processes of:

  • estimating a first tonality based on component tones included in a first segment having a first length, the first segment being specified in the data of the musical piece;

    estimating a second tonality based on component tones included in a second segment having a second length different from the first length, the second segment being specified in the data of the musical piece and at least partially overlapping with the first segment;

    comparing the estimated first tonality with the estimated second tonality to judge a tonality or a chord of the first segment of the musical piece;

    comparing the estimated first tonality with the estimated second tonality to decide an appropriate tonality; and

    judging a chord of the first segment of the musical piece based on the decided appropriate tonality.

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