# Audio credits

Every file here is CC0 1.0 (public domain dedication,
<https://creativecommons.org/publicdomain/zero/1.0/>). No attribution is required; we credit
the authors anyway. Licences checked on the source pages on 2026-09-27.

Formats: `.ogg` is Opus (music 96 kbps stereo, effects 48 kbps mono), `.mp3` is the fallback
(music 128 kbps, effects 96 kbps mono). Loops were re-cut with a crossfaded seam (ffmpeg).

## Music

| File | Title | Author | Source | Licence |
|---|---|---|---|---|
| `music-winning-the-race` | Winning the Race | section31 | <https://opengameart.org/content/winning-the-race> | CC0 |
| `music-hyperflight-racing` | Hyperflight Racing | cynicmusic (cynicmusic.com, pixelsphere.org) | <https://opengameart.org/content/hyperflight-racing> | CC0 |
| `music-hyper-ultra-racing` | Hyper Ultra-Racing | cynicmusic (cynicmusic.com, pixelsphere.org) | <https://opengameart.org/content/hyper-ultra-racing> | CC0 |

Attribution text shown in the essay: "Music: *Winning the Race* by section31, *Hyperflight
Racing* and *Hyper Ultra-Racing* by cynicmusic (cynicmusic.com). All CC0, from
OpenGameArt.org."

## Sound effects

| File | Source file | Pack | Author | Source | Licence |
|---|---|---|---|---|---|
| `engine-ai` | spaceEngine_000 | Sci-fi Sounds | Kenney | <https://kenney.nl/assets/sci-fi-sounds> | CC0 |
| `mine-hum` | engineCircular_000 | Sci-fi Sounds | Kenney | same | CC0 |
| `pad` | forceField_002 | Sci-fi Sounds | Kenney | same | CC0 |
| `shield` | forceField_000 | Sci-fi Sounds | Kenney | same | CC0 |
| `shot` | laserLarge_000 | Sci-fi Sounds | Kenney | same | CC0 |
| `explosion` | explosionCrunch_000 | Sci-fi Sounds | Kenney | same | CC0 |
| `explosion-low` | lowFrequency_explosion_000 | Sci-fi Sounds | Kenney | same | CC0 |
| `impact` | impactMetal_heavy_000 | Impact Sounds | Kenney | <https://kenney.nl/assets/impact-sounds> | CC0 |
| `impact-light` | impactPlate_heavy_001 | Impact Sounds | Kenney | same | CC0 |
| `shield-pop` | impactGlass_light_002 | Impact Sounds | Kenney | same | CC0 |
| `pickup` | confirmation_002 | Interface Sounds | Kenney | <https://kenney.nl/assets/interface-sounds> | CC0 |
| `mine-drop` | drop_002 | Interface Sounds | Kenney | same | CC0 |
| `count` | select_002 | Interface Sounds | Kenney | same | CC0 |
| `go` | bong_001 | Interface Sounds | Kenney | same | CC0 |
| `lap` | jingles_STEEL00 | Music Jingles | Kenney | <https://kenney.nl/assets/music-jingles> | CC0 |
| `finish` | jingles_HIT00 | Music Jingles | Kenney | same | CC0 |
| `scrape` | scrape-1 | Scrapes | AntumDeluge | <https://opengameart.org/content/scrapes> | CC0 |
| `airbrake` | whoosh2 | Air whoosh | pyranostudios | <https://opengameart.org/content/air-whoosh> | CC0 |

## Synthesized in the page

No file. Built with the Web Audio API at run time: the player's engine in `engine-sound.js`
(turbine whine, blade air, sub and rumble, field hum, air rush), and in `audio.js` the boost
whoosh, the AI pass-by whoosh and the mine crackle.