# Crash sounds — provenance

<!-- section:sfx -->
One-shot crash / crowd clips (`sfx.json` lists them by slot: thud, splat, crunchBone, crunchWood,
crunchPlastic, crunchMetal, crowd, bang, stone, glassCrack; the stick's `thwack` has its own section below). All are real CC0 recordings from Freesound,
played as recorded — only cut, mono and level.

| File | Source | Author | Licence | What it is |
|---|---|---|---|---|
| `thud-0.mp3` | [257928 — "Body Thud.wav"](https://freesound.org/people/Kane53126/sounds/257928/) | Kane53126 | [CC0 1.0](https://creativecommons.org/publicdomain/zero/1.0/) | A dull body thud |
| `thud-1.mp3` | [235451 — "Body_Hit_Coat_Against_Wall.wav"](https://freesound.org/people/jcdecha/sounds/235451/) | jcdecha | [CC0 1.0](https://creativecommons.org/publicdomain/zero/1.0/) | A body / cloth bag hitting a wall |
| `splat-0.mp3` | [641046 — "Gore Impact - 'LOT OF HEART'"](https://freesound.org/people/magnuswaker/sounds/641046/) | magnuswaker | [CC0 1.0](https://creativecommons.org/publicdomain/zero/1.0/) | Meat dropped + a goat heart squeezed: wet, sloppy gore impact |
| `splat-1.mp3` | [360942 — "splat.ogg"](https://freesound.org/people/gprosser/sounds/360942/) | gprosser | [CC0 1.0](https://creativecommons.org/publicdomain/zero/1.0/) | A punchy wet splat |
| `crunchBone-0.mp3` | [652660 — "Neck Snap1.wav"](https://freesound.org/people/sound_and_fury/sounds/652660/) | sound_and_fury | [CC0 1.0](https://creativecommons.org/publicdomain/zero/1.0/) | Celery broken: a snap, then a crunch |
| `crunchBone-1.mp3` | [388020 — "Celery Snap 2.wav"](https://freesound.org/people/saturdaysoundguy/sounds/388020/) | saturdaysoundguy | [CC0 1.0](https://creativecommons.org/publicdomain/zero/1.0/) | Celery snapped in half: one sharp crack |
| `crunchWood-0.mp3` | [66780 — "Crate Break 4.wav"](https://freesound.org/people/kevinkace/sounds/66780/) | kevinkace | [CC0 1.0](https://creativecommons.org/publicdomain/zero/1.0/) | A wooden crate broken open |
| `crunchWood-1.mp3` | [856631 — "crate_break4"](https://freesound.org/people/K-Forces/sounds/856631/) | K-Forces | [CC0 1.0](https://creativecommons.org/publicdomain/zero/1.0/) | Wooden pallets broken in a warehouse |
| `crunchPlastic-0.mp3` | [330242 — "Carton crush_05.wav"](https://freesound.org/people/deleted_user_2104797/sounds/330242/) | deleted_user_2104797 | [CC0 1.0](https://creativecommons.org/publicdomain/zero/1.0/) | A plastic milk carton squashed underfoot |
| `crunchPlastic-1.mp3` | [260003 — "impact-01.wav"](https://freesound.org/people/simonjsounds/sounds/260003/) | simonjsounds | [CC0 1.0](https://creativecommons.org/publicdomain/zero/1.0/) | Plastic breaking on impact |
| `crunchMetal-0.mp3` | [562198 — "snd_metal_smash.wav"](https://freesound.org/people/gristi/sounds/562198/) | gristi | [CC0 1.0](https://creativecommons.org/publicdomain/zero/1.0/) | A metal object smashed: hard metallic crash |
| `crowd-0.mp3` | [480805 — "R15-73-Small Group of Men Shouting.wav"](https://freesound.org/people/craigsmith/sounds/480805/) | craigsmith | [CC0 1.0](https://creativecommons.org/publicdomain/zero/1.0/) | A small group of men shouting outdoors, not in English |
| `crowd-1.mp3` | [834338 — "Medium Crowd Yelling At Street Fight"](https://freesound.org/people/IENBA/sounds/834338/) | IENBA | [CC0 1.0](https://creativecommons.org/publicdomain/zero/1.0/) | A group of 20+ people yelling at a (staged) street fight |
| `bang-0.mp3` | [344565 — "Metal Knock 1.wav"](https://freesound.org/people/dster777/sounds/344565/) | dster777 | [CC0 1.0](https://creativecommons.org/publicdomain/zero/1.0/) | A fist knocking once on a piece of metal |
| `bang-1.mp3` | [637480 — "door metal knock heavy bang from other side.flac"](https://freesound.org/people/kyles/sounds/637480/) | kyles | [CC0 1.0](https://creativecommons.org/publicdomain/zero/1.0/) | Heavy bangs on a metal door (3 hits) |
| `bang-2.mp3` | [812063 — "dumpster-0"](https://freesound.org/people/nikerk/sounds/812063/) | nikerk | [CC0 1.0](https://creativecommons.org/publicdomain/zero/1.0/) | A fist hitting an empty dumpster |
| `stone-0.mp3` | [406261 — "hit - glass - window 01.wav"](https://freesound.org/people/Anthousai/sounds/406261/) | Anthousai | [CC0 1.0](https://creativecommons.org/publicdomain/zero/1.0/) | A glass window hit with a wooden spoon |
| `stone-1.mp3` | [109358 — "rock lands on metal.aiff"](https://freesound.org/people/SoundCollectah/sounds/109358/) | SoundCollectah | [CC0 1.0](https://creativecommons.org/publicdomain/zero/1.0/) | A stone dropped on a metal bar |
| `glassCrack-0.mp3` | [806423 — "Car windshield crack"](https://freesound.org/people/Sanderboah/sounds/806423/) | Sanderboah | [CC0 1.0](https://creativecommons.org/publicdomain/zero/1.0/) | A big mirror cracking (sounds like a windscreen) |
| `glassCrack-1.mp3` | [418194 — "Hard Glass Impact"](https://freesound.org/people/deleted_user_3656686/sounds/418194/) | deleted_user_3656686 | [CC0 1.0](https://creativecommons.org/publicdomain/zero/1.0/) | Glass impact with cracks forming |

Licence checked on each sound's Freesound page on 2026-10-03 (all show "Creative Commons 0").
`deleted_user_…` authors are Freesound accounts since closed; their uploads stay CC0.

**Edits made** (`sox` + `lame`, from each sound's Freesound HQ preview MP3): the useful part cut out,
downmixed to mono at 44.1 kHz, 5 ms fade-in / 30 ms fade-out, normalised to −1 dB peak, 96 kbps mono MP3.
No pitch, EQ or other processing.

```
sox <id>-hq.mp3 cut.wav trim <start> =<end> remix - rate 44100 fade t 0.005 -0 0.03 gain -n -1
lame -b 96 -m m cut.wav <slot>-<n>.mp3
```

| File | Freesound id | trim (s) | length (s) |
|---|---|---|---|
| `thud-0.mp3` | 257928 | 0.74 – 1.20 | 0.46 |
| `thud-1.mp3` | 235451 | 0.13 – 0.62 | 0.49 |
| `splat-0.mp3` | 641046 | 0.02 – 0.80 | 0.78 |
| `splat-1.mp3` | 360942 | 0.03 – 0.45 | 0.42 |
| `crunchBone-0.mp3` | 652660 | 0.17 – 0.95 | 0.78 |
| `crunchBone-1.mp3` | 388020 | 0.24 – 0.62 | 0.38 |
| `crunchWood-0.mp3` | 66780 | 0.04 – 0.90 | 0.86 |
| `crunchWood-1.mp3` | 856631 | 0.35 – 1.00 | 0.65 |
| `crunchPlastic-0.mp3` | 330242 | 0.82 – 1.25 | 0.43 |
| `crunchPlastic-1.mp3` | 260003 | 0.31 – 0.60 | 0.29 |
| `crunchMetal-0.mp3` | 562198 | 0.04 – 0.90 | 0.86 |
| `crowd-0.mp3` | 480805 | 1.00 – 4.50 | 3.50 |
| `crowd-1.mp3` | 834338 | 1.25 – 4.75 | 3.50 |
| `bang-0.mp3` | 344565 | 0.23 – 1.00 | 0.77 |
| `bang-1.mp3` | 637480 | 0.15 – 0.92 | 0.77 |
| `bang-2.mp3` | 812063 | 0.04 – 1.00 | 0.96 |
| `stone-0.mp3` | 406261 | 0.02 – 0.60 | 0.58 |
| `stone-1.mp3` | 109358 | 0.03 – 0.70 | 0.67 |
| `glassCrack-0.mp3` | 806423 | 0.04 – 1.00 | 0.96 |
| `glassCrack-1.mp3` | 418194 | 0.03 – 0.62 | 0.59 |
<!-- /section:sfx -->

<!-- section:thwack -->
## Stick recordings (thwack)

A hockey stick / lathi on the truck's sheet metal (the danda party's blows, `attacked` { what 'stick' }; one
take at random). All are real CC0 recordings from Freesound, played as recorded — only cut, mono and level.
Loaded with the other crash clips (`loadCrashSfx()`).

| File | Source | Author | Licence | What it is |
|---|---|---|---|---|
| `thwack-0.mp3` | [406560 — "hit - metallic - trailer - metal fender 01.wav"](https://freesound.org/people/Anthousai/sounds/406560/) | Anthousai | [CC0 1.0](https://creativecommons.org/publicdomain/zero/1.0/) | A trailer's metal fender hit with a WOODEN ROD (Tascam DR-40): a woody crack and a short sheet-metal clang. The closest on paper to a lathi on a truck door. (0.03–0.7 s; Claude's provisional pick 2026-10-06 for Gyan to confirm, A/B stick-sfx-ab thwack) |
| `thwack-1.mp3` | [398269 — "Hitting metal surface with stick.wav"](https://freesound.org/people/gabytoledosci/sounds/398269/) | gabytoledosci | [CC0 1.0](https://creativecommons.org/publicdomain/zero/1.0/) | A wooden stick on a big metal surface, a BRIGHT hard hit: crack plus metal ring. (34.66–35.6 s; Claude's provisional pick 2026-10-06 for Gyan to confirm, A/B stick-sfx-ab thwack) |

Licence checked on each sound's Freesound page (all show "Creative Commons 0") when the A/B set was
made (design/…-ab/README.txt; the A/B sets are local only, never shipped).

**Edits made** (`sox` + `lame`, from each sound's Freesound HQ preview MP3; no pitch, EQ or other
processing): a **shot** is cut out, downmixed to mono at 44.1 kHz, 5 ms fade-in / a short fade-out,
levelled (loudest 100 ms RMS → −14 dBFS, peak ≤ −1 dBFS), 96 kbps mono MP3. A **loop** is a steady
stretch cut out with its end nudged so the rhythm at the seam matches the start, the recording's next
0.05–0.5 s cross-faded (equal power) over the start, levelled (whole-loop RMS → −18 dBFS, peak ≤
−1 dBFS), 96 kbps mono MP3; the game crossfades the seam again (synth.buildSeamlessLoop).
<!-- /section:thwack -->