Luckyverse audio sources and credits

ORIGINAL MUSIC (procedural, layered)
Nine original songs (lobby and eight machines: tiger, egypt, fruit, ocean,
dragon, moon, western, candy) and the casino-floor ambience loop are computed
by the project's deterministic generator, scripts/generate-scene-audio.py,
following the owner's procedural method from the game 逃出孤岛 (Island Escape):
every instrument is a formula (pitch-falling drums, double-differenced-noise
shakers, inharmonic bells and gongs, Karplus-Strong plucks - guzheng, pipa,
qanun, oud, shamisen, koto, banjo, harp - breath-and-harmonics flutes, reeds,
bowed strings, horns, synth bass; models in scripts/audio_dsp.py and
scripts/audio_instruments.py), all noise comes from fixed seeds, and the same
code writes the same audio every run (music/manifest.json keeps a PCM hash per
file; `--verify` re-renders and compares). No samples, no recordings, no DAW
and no AI music model are used, and no reference game's music or melody.
Each machine's song is rendered as aligned stems that the game mixes by state:
base (idle), drive (reels spinning), bonus (bonus and free spins) and a
two-bar tension loop (reel anticipation). The shared ambient loop (crowd
murmur from formant-filtered pulse voices, far-off reel clacks, coin drops) is
computed the same way and contains no speech.

ORIGINAL SOUND EFFECTS
All effects in sfx/core.mp3 and sfx/celebrate.mp3 (taps, chips, spin, reel loop and
reel stops, anticipation, win stingers and count-up ticks, bonus, free spins,
rewards, level up, prize wheel) are synthesized for this project by
scripts/generate-sfx.py. No sound is sampled from any commercial game or video.
The two recordings below are layered into some of those effects.

ORIGINAL MACHINE SOUND SETS
Each machine has its own effect sprite, synthesized for this project by
scripts/generate-sfx.py from the palettes in scripts/sfx_themes.py (instrument
models in scripts/audio_instruments.py; listening guide in
docs/machine-sound-guide.md). They contain no recordings at all:
  sfx/tiger.mp3    Golden Tiger: guzheng, dizi flute, bamboo blocks, wind chimes
  sfx/egypt.mp3    Sands of the Pharaoh: oud, mizmar, darbuka, sistrum, zills
  sfx/fruit.mp3    Fruit Fiesta: marimba, steel pan, congas, guiro, juicy pops
  sfx/ocean.mp3    Ocean Treasures: harp, water drops, bubbles, ship's bell, whale
  sfx/dragon.mp3   Dragon's Gold: shamisen, taiko, hyoshigi, kane, fire crackle
  sfx/moon.mp3     Moonlight Magic: crystal glass, celesta, choir pad, owl
  sfx/western.mp3  Wild West Riches: banjo, harmonica, hooves, spurs, whip crack
  sfx/candy.mp3    Sugar Kingdom: toy xylophone, glass plinks, pops, slide whistle

REAL COIN RECORDING
"Coin Drop" by Vinrax
Source: https://opengameart.org/content/coin-drop
License: CC0 1.0 Universal
https://creativecommons.org/publicdomain/zero/1.0/
Changes: trimmed to 0.42 seconds, resampled at varied speeds, panned, low-passed,
layered as coin showers inside the win, big-win, mega-win and reward effects
(scripts/audio-sources/coin-drop-vinrax-cc0.mp3 is the trimmed input).

REAL CROWD CHEERING
"Free Crowd Cheering Sounds" by Gregor Quendel
Source: https://opengameart.org/content/free-crowd-cheering-sounds
Author: https://www.gregorquendel.com/
License: Creative Commons Attribution 4.0 International
https://creativecommons.org/licenses/by/4.0/
Full legal text: CC-BY-4.0.txt in this directory.
Changes: an excerpt of "04 - Strong cheering - II - Short", beginning at
6.0 seconds, shortened, faded, filtered (high-pass 250 Hz), lowered and mixed
under the mega-win effect only (sfx/celebrate.mp3, clip "mega-win").
scripts/audio-sources/crowd-cheer-gregor-quendel-cc-by-4.0.mp3 is the input.
This credit does not imply endorsement.

SYNTHETIC SPOKEN ANNOUNCEMENTS
Nineteen game-specific English phrases are generated offline with
Kokoro-82M v1.0, synthetic voice af_heart. See voice/NOTICE.txt,
voice/APACHE-2.0.txt and voice/manifest.json for source links, license,
transcripts, phonemes and hashes.
No runtime cloud TTS, named-person impersonation or voice cloning is used.

All audio is served locally. Reference game publishers and these asset
authors/model maintainers do not endorse or sponsor Luckyverse.