: For a full experience, look for the Howl's Moving Castle Soundtrack Piano Collections on Apple Music , which includes various solo and duet versions of "The Promise of the World" and "Merry-Go-Round of Life". Where to Download for Practice
If your goal is to learn the piece, several sites provide the audio alongside the sheet music: Merry-Go-Round of Life: Howl's Moving Castle Piano Tutorial
To find a high-fidelity piano recording, you can explore both official studio versions and renowned fan arrangements: