# Stadium audio credits

Recorded human crowd samples used in Futpixel. Downloaded from the creators' Freesound preview files on 2026-09-26. All samples play locally; no audio is fetched from these websites at runtime.

| Local sample | Original work / author | License | Changes |
| --- | --- | --- | --- |
| `ambience.wav` | [Norwegian football match/soccer game ambience.WAV — habbis92](https://freesound.org/people/habbis92/sounds/206003/) | [CC0 1.0](https://creativecommons.org/publicdomain/zero/1.0/) | 24–46 second excerpt, mono 22050 Hz, normalized and faded |
| `cheer.wav` | [Goal.wav — Sandermotions](https://freesound.org/people/Sandermotions/sounds/494352/) | [CC0 1.0](https://creativecommons.org/publicdomain/zero/1.0/) | First 8 seconds, mono 22050 Hz, normalized and faded |
| `boos.wav` | [crowd booing — HowardV](https://freesound.org/people/HowardV/sounds/264378/) | [CC0 1.0](https://creativecommons.org/publicdomain/zero/1.0/) | 0.4–4.9 second excerpt, mono 22050 Hz, normalized and faded |
| `chant.wav` | [Crowd Cheering - Rhythmic Cheering.wav — GregorQuendel](https://freesound.org/people/GregorQuendel/sounds/481772/) | [CC BY 4.0](https://creativecommons.org/licenses/by/4.0/) | 1.5–10.5 second excerpt, mono 22050 Hz, normalized and faded |

The same WAV data is embedded in `stadium-samples.js` for `file://` compatibility. Club-independent recorded chanting is used; these recordings are not advertised as chants of any particular selected club. The chant recording is credited to **Gregor Quendel** ([creator website](https://www.gregorquendel.com/)). No endorsement by the creators is implied.

Kick, pass, header, volley, throw, tackle, body contact, goalkeeper save, footstep, goalpost and referee-whistle effects are original procedural sound design in `stadium-audio.js`. Procedural crowd fallback is used only if Web Audio cannot decode the included recordings; it is not a human stadium recording.

Source preview files: `206003_878508-hq.mp3`, `494352_1402315-hq.mp3`, `264378_1654262-hq.mp3`, `481772_8432823-hq.mp3`, on `https://cdn.freesound.org/previews/{first-three-digits}/`.

Rebuild samples with `node scripts/build-stadium-audio.cjs`. Technical measurements are written to `artifacts/audio-asset-checks.json`.