We visualize the tonality distribution of SymMV in Fig. 5.
We also compute the statistics of both the total duration beats
of each note and each chord in Fig. 6 and Fig. 7. To eliminate
the influence of key on chord distribution for better analysis,
we transposed major key music to C major and minor key
music to A minor in order to present the chord distribution
in the dataset more accurately and intuitively.
A.3. Analysis of Genres and Chords

The number of music in different genres is shown in
Tab. 5. In Sec. 3.3, we analyze the chord distribution in
different genres. Here we further provide the chord transition
matrix for common chords in different genres. As shown
in Fig. 8, we observe that the chord transition matrix is

4https://developers.google.com/youtube/v3
5https://github.com/dotX12/ShazamIO

Table 5: Genres of music in SymMV.
VideoBackgroundMusicGeneration