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music-x-lab / POP909-Dataset

This is the dataset repository for the paper: POP909: A Pop-song Dataset for Music Arrangement Generation
MIT License
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Question about chord annotation #4

Closed zaocan666 closed 3 years ago

zaocan666 commented 3 years ago

Hi~ Great datasets! I have some doubts about midi chord annotation. There are chords like C#:maj/3 and Bb:min/b3. I assume "/3" and "/b3" part indicates that the bass note is the third note of the chord. However, I don't understand the difference between "/3" and "/b3" I would really appreciate it if you could explain.

RetroCirce commented 3 years ago

Hi~ You can refer to https://www.music-ir.org/mirex/wiki/2020:Audio_Chord_Estimation to find the explanation of chord formats As for your question: 1.maj/3 means the third note (the middle note) is the bass note as inversion major chord, because a major chord contains 1-3-5.

  1. min/b3 means the third note (the middle note) is the bass note, because a minor chord contains 1-b3-5. Therefore, they are the same. You can find more details in the above website.
zaocan666 commented 3 years ago

Hi~ You can refer to https://www.music-ir.org/mirex/wiki/2020:Audio_Chord_Estimation to find the explanation of chord formats As for your question: 1.maj/3 means the third note (the middle note) is the bass note as inversion major chord, because a major chord contains 1-3-5.

  1. min/b3 means the third note (the middle note) is the bass note, because a minor chord contains 1-b3-5. Therefore, they are the same. You can find more details in the above website.

thank you very much for answering