Play3D preserves the original sound identities of Yaniv Island and Atelier.

YANIV ISLAND
Island marimba: Krakatoa by Kistol, CC0.
https://opengameart.org/content/krakatoa
Copied unchanged from Yaniv Island's public/audio/island.mp3. Play3D plays an eight-second preview with a soft entrance and exit.

ATELIER
Salamander Grand Piano V3 by Alexander Holm, recorded on a Yamaha C5.
Creative Commons Attribution 3.0 Unported: https://creativecommons.org/licenses/by/3.0/
Source: https://archive.org/details/SalamanderGrandPianoV3
Original stereo C4 v7 Ogg recording, copied unchanged from Atelier. Play3D applies a short playback envelope for the preview.

The visual piano model and its recording are separate source assets.

FLOOR FEVER
Original electro-disco music composed and synthesized for the Play3D dance game. 120 BPM, stereo. Full credits: /worlds/dance/credits.txt