Background playlist — Kevin MacLeod (incompetech.com)
License for all three works: Creative Commons Attribution 4.0 International (CC BY 4.0)
License URL: https://creativecommons.org/licenses/by/4.0/

1. Carefree
Official work page: https://incompetech.com/music/royalty-free/index.html?isrc=USUAN1400037
Original MP3: https://incompetech.com/music/royalty-free/mp3-royaltyfree/Carefree.mp3
Packaged file: bgm-carefree.mp3

2. Life of Riley
Official work page: https://incompetech.com/music/royalty-free/index.html?isrc=USUAN1400054
Original MP3: https://incompetech.com/music/royalty-free/mp3-royaltyfree/Life%20of%20Riley.mp3
Packaged file: bgm-life-of-riley.mp3

3. Easy Lemon
Official work page: https://incompetech.com/music/royalty-free/index.html?isrc=USUAN1200076
Original MP3: https://incompetech.com/music/royalty-free/mp3-royaltyfree/Easy%20Lemon.mp3
Packaged file: bgm-easy-lemon.mp3

Adaptations for this H5: loudness adjustment (3 dB lower than the previous edition), 1.2-second fade-in, 2.5-second fade-out, re-encoding to stereo MP3 128 kbps. Compositions and tempos are unchanged. Attribution is also provided in the standalone 素材说明.html in the website root. Keep that page, this credit and the license links when redistributing the website.