# Zvuky / Sound credits

All recordings come from Wikimedia Commons and were trimmed, filtered and loudness-normalised for this site.

| File | Source | Author | Licence |
|---|---|---|---|
| `bell.mp3` | [Bachgasse Schulglocke Paganinnni 2021 01.ogg](https://commons.wikimedia.org/wiki/File:Bachgasse_Schulglocke_Paganinnni_2021_01.ogg) | Paganinnni | CC BY-SA 4.0 |
| `chatter.mp3` | [Sneeuwballengevecht schoolplein 130121 02 - SoundCloud - the riel thing.ogg](https://commons.wikimedia.org/wiki/File:Sneeuwballengevecht_schoolplein_130121_02_-_SoundCloud_-_the_riel_thing.ogg) | the_riel_thing | CC BY-SA 3.0 |
| `taps.mp3` | [Knocking on wood or door.ogg](https://commons.wikimedia.org/wiki/File:Knocking_on_wood_or_door.ogg) | stephan | Public domain |
| `chalk.mp3` | [Chalkboard-writing.ogg](https://commons.wikimedia.org/wiki/File:Chalkboard-writing.ogg) | Tomproberts | CC0 |

`bell.mp3` and `chatter.mp3` are adaptations and are shared under the same CC BY-SA licences.
All other sounds (music box, wind, birds, paper) are synthesised live in the browser.