# Current game audio

The following clips were supplied by the project owner and edited locally on 14 October 2026. Source ownership and licenses are not inferred from the filenames.

| Game file | Supplied source | Source excerpt (seconds) |
|---|---|---|
| user-scream.mp3 | Scary Demon Scream Sound.mp3 — metadata credits Royalty Beat SFX | 0.00–3.35; trailing silence removed |
| user-arrival.mp3 | Nasta T-Centralen - Alexey Froloff (raorn) (128k).mp3 | 2.65–3.50; first tonal signal, excluding the long recording |
| user-doors-open.mp3 | Dörrarna öppnas och stängs [wgwzx8YNnp0].mp3 — metadata credits TCR Ränne😎 YT | 0.26–1.91 |
| user-doors-warning.mp3 | Same door recording | 15.00–17.70 |
| user-doors-close.mp3 | Same door recording | 17.85–19.50 |

Excerpts use short edge fades and retain original playback pitch. The warning plays before the doors move; the closing sound starts with the closing animation. Charging has one synthesized plug-in chirp. Train rumble is synthesized: the previous recording containing passenger voices is no longer loaded or played.

## Previous assets retained but not used by the current audio engine


Downloaded 13 October 2026. The distributed files are local excerpts of the creators' Freesound previews; the game does not contact Freesound during play.

- **stockholm-arrival.mp3** — “Stockholm metro (subway) inside, arriving Aspudden” by **blaukreuz**, [source](https://freesound.org/people/blaukreuz/sounds/398865/), [CC0](https://creativecommons.org/publicdomain/zero/1.0/). Excerpt 53–71 seconds, filtered, normalized and faded. Used for station approaches; the recording is authentic, the in-game timing is adapted.
- **stockholm-running.mp3** — “Stockholm-subway-ride” by **jobro**, [source](https://freesound.org/people/jobro/sounds/112252/), [CC BY 3.0](https://creativecommons.org/licenses/by/3.0/). Excerpt 8–32 seconds, filtered, normalized and faded; looped and mixed according to train speed for departure and travel. This is recorded Stockholm metro ambience, not a new recording synchronized to every fictional stop. No endorsement by the creator is implied.
- **stockholm-chime.mp3** — “Stockholm Subway Train Jingle” by **RaygunGoth**, [source](https://freesound.org/people/RaygunGoth/sounds/209977/), [CC0](https://creativecommons.org/publicdomain/zero/1.0/). Recorded announcement chime.
- **scream.mp3** — “Male Death Scream” by **Thanra**, [source](https://freesound.org/people/Thanra/sounds/178313/), [CC0](https://creativecommons.org/publicdomain/zero/1.0/). Layered at different playback rates and enveloped for the attack animation.

Footsteps, breathing, contact knocks, phone sounds and the quiet underlying room tone are synthesized in `src/audio.js`. Browser speech synthesis is disabled; route announcements use the recorded chime and on-screen captions. The mix includes a master compressor.

The two face images in `public/images` are AI-generated original assets created for this game.

## Onboard station voice

`stations/*.mp3` are locally synthesized Swedish Alva voice announcements (19 station names and one terminus message), generated 14 October 2026. They are not SL recordings. Each next-station phrase follows the recorded signal by 0.95 seconds. Platform arrivals have no destination voice.