Silence (安静) - Harmonic and Melodic Analysis

This piece starts off with Bb major. It starts off with its theme with I-IV-vi-V and repeats and after which it comes off to the part where the singing starts. The progression is as follows: I-vi-IV-IV65-I-vi-IV-IV65-ii-V-V6-V/ii-ii-iii....

If you can see, the progression of the singing part is actually the opposite from the theme where it goes from IV-vi but instead it goes from vi-IV.

Jay kinds of delay the dominant after tonic by using 1st inversion chords and chord ii.

The only tonicized key was at the second bar of page 2, where he tonicized to C major.
This could be the anticipation or rather a hint that he wants to go into the C major key later.

At the part where the song goes into its peak, C major key comes in and it's not surprising at all due to the hint earlier on. The peak is also established using different time signatures like 2/4 and 3/4.

At page 7, the pre-dominant chord (chord vi) goes into C major and starts off with chord V.
After which, I notice that there's I in its root position, 1st inversion of I and 2nd inversion of I, all in the preceding bar.

And at the end of page 7, there's a chromatic neighbour note F# being used.

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I have noticed that the melody from the start is rather restricted to the range from D to B.
But in page 2, highlighted in purple, the use of D and E helps to open up the melody and gives more space for it to go higher.

The are also alot of leaps used in this song. They are all highlighted in purple too. This is especially different from normal classical songs where leaps are seldom used. I guess in modern compositions, these leaps not only provide new forms, but also help make the composition more interesting.