The four main theme songs
- Sure, some might consider them just catchy, but many others consider the energetic Hikaru Nara (1st op song), the cheerful Nanairo Symphony (2nd op song), the heartwarming Kirameki (1st ed song), and the tearjerking Orange (2nd ed song) worthy of their playlist.
- And then in the last episode they add the more tearjerking, acoustic version of Kirameki and Orange.
The classical pieces
- Episode 1. Kousei's performance on flashback when he just lost his mother note .
- Episode 2. Kaori's wild performance. note
- Episode 3. Kousei's one-hand piano performance of Twinkle Twinkle Little Stars.
- Episode 4. Kousei & Kaori's "brawl" performance. note
- Episode 8. Takeshi's performance note , and Emi's performance note .
- Episode 10. Kousei's comeback performance. note
- Episode 13. Kousei performance when he's finally able to cope with the loss of his mother. note
- Episode 18. Kousei and Nagi's four-hands duet performance. note
- Episode 19. Takeshi's performance note .
- Episode 21. Kousei's starting performance note , which continues its entire performance in Episode 22, Kousei's and imaginary/spirit Kaori's final performance.
- Despite being a background piece, "Yuujin A kun wo Watashi no Bansousha Ni Ninmeishimasu", note the theme which plays before the performers' big performance builds up the pressure of the atmosphere with the piano, while giving a sense of excitement of looking forward to the grand moment of performance with the strings. It captures the mood of the restlessness of a performer preparing to be onstage and the wonder of having their song be conveyed to the audience perfectly and flawlessly.