Fruit Vocabulary Game — background music
License checked: 2026-10-01

All three source submissions explicitly declare CC0 1.0 Universal.
License: https://creativecommons.org/publicdomain/zero/1.0/
CC0 permits free copying, modification, distribution and commercial use without
asking permission or requiring attribution. Credit is retained voluntarily.
The uploader's licence declaration is not a warranty of third-party rights;
neither the musicians nor OpenGameArt endorse this tool.

Stage 1 (03:00–02:01 remaining): Happy Beat — burabotti
Source: https://opengameart.org/content/happy-beat
Original: https://opengameart.org/sites/default/files/happybeat.ogg
Local: stage-1-happy-beat.mp3
Processing: original tempo; loudness normalization; 25ms edge fades; MP3 encoding.

Stage 2 (02:00–01:01 remaining): Happy Adventure (Loop) — TinyWorlds
Source: https://opengameart.org/content/happy-adventure-loop
Original: https://opengameart.org/sites/default/files/happy_adveture.mp3
Original ID3 artist: Rick Hoppmann; ID3 title: The Fish is Blue.
Local: stage-2-happy-adventure.mp3
Processing: 1.08x tempo with pitch preserved; normalization; edge fades; MP3 encoding.

Stage 3 (01:00–00:00 remaining): Upbeat Title Theme Loop — beardalaxy
Source: https://opengameart.org/content/upbeat-title-theme-loop
Original: https://opengameart.org/sites/default/files/title_in_game.ogg
Local: stage-3-upbeat-theme.mp3
Processing: 1.12x tempo with pitch preserved; normalization; edge fades; MP3 encoding.

Encoding: existing FFmpeg / libmp3lame, stereo 32kHz at 80kbps.
Source loudness target: -20 LUFS, -2dBTP (single-pass loudnorm).
Playback gain: 0.45; stage changes crossfade over 450ms.
Tempo multipliers refer to each track's own original tempo, not an exact common BPM.
Default: music on; an explicit saved off preference remains off. No music download or playback on page load; playback requires an enabled preference and starting a game.
First asset failure: silently continue the game and offer a music retry.

SHA-256 of the processed, shipped files:
stage-1-happy-beat.mp3
A3C0F334F26445D8B1769C212F3B5A7083A9223B2F38649D1DC36311C6CA6E25
stage-2-happy-adventure.mp3
4BA471D7F464947CE3AC1AC071615112508DA46046DF86F870A2EA55B60CB2B9
stage-3-upbeat-theme.mp3
78422AFEF6C98D25A9F36E53D30DEFB0E90BDB465BC730D034DF00ED1BB8C614

SHA-256 of the originals downloaded from the URLs above:
happybeat.ogg
7BE39701CCBE9FAA9D69952BD6DD6A6412BCDF3212DEA33085AC8CC6DCD35804
happy_adveture.mp3
50AA6A32625FE8565403A0C8CEB772D7FB500B9267D0019EACFE0FC742B6C73D
title_in_game.ogg
930D4A701CAECED41BAB415C5269C94B4EDC00A2CB3FD5B8EBF24BDB9F3E2017