different genres of music. To ensure statistical significance,
we choose the five most frequent genres and ten chord types
with high frequency and high variance. As Fig. 3 (c) shows,
the final chord distribution meets our expectations. In pop
music, the most steady chords, e.g., CM, FM, and Am, oc-
cupy the largest proportion, in line with the stability of pop
music. In contrast, some rarely seen chords have a high
frequency in R&B/Soul, such as Dm7 and Am7, in order
to create a richer and more diverse harmonic palette. Alter-
native, as a type of Rock, tends to favor simpler chords, so
the occurrences of seventh chords are less frequent. As for
Hip-Hop/Rap, the singing part is less melodic, and therefore,
there are generally more seventh chords to provide accom-
paniments with more space for expression and to fill the
harmony space. We provide more analysis in the Appendix.
Rhythm and Genre. We use kernel density estimate (KDE)
VideoBackgroundMusicGeneration