| 1 | # Third-Party Sound Notices |
| 2 | |
| 3 | The WAV files under this directory are modified copies of third-party CC0 |
| 4 | sound assets. PPT Master's MIT license covers PPT Master itself; the source |
| 5 | declarations below describe the bundled sounds. |
| 6 | |
| 7 | ## Bundled snapshot |
| 8 | |
| 9 | Snapshot date: **2026-08-10**. |
| 10 | |
| 11 | | Directory | Upstream snapshot | Bundled files | Local modification | |
| 12 | |---|---|---:|---| |
| 13 | | `kenney-interface` | [Kenney Interface Sounds](https://kenney.nl/assets/interface-sounds), archive supplied as version 1.0 | 100 | Ogg Vorbis transcoded to PCM 16-bit 44.1 kHz WAV while preserving mono/stereo layout | |
| 14 | | `kenney-ui` | [Kenney UI Audio](https://kenney.nl/assets/ui-audio), versionless current archive | 51 | Ogg Vorbis transcoded to PCM 16-bit 44.1 kHz WAV while preserving stereo layout; `Preview.ogg` excluded | |
| 15 | | `bigsoundbank` | [BigSoundBank](https://bigsoundbank.com/) sound IDs listed below | 35 | Source WAV resampled and, where needed, reduced to PCM 16-bit at 44.1 kHz while preserving mono/stereo layout | |
| 16 | |
| 17 | No sound was trimmed, loudness-processed, or unnecessarily downmixed. |
| 18 | Final-file metadata and SHA-256 digests are recorded in `sounds_index.json`. |
| 19 | The Kenney archive URLs and archive digests are also recorded there. |
| 20 | |
| 21 | The normalization pass is equivalent to: |
| 22 | |
| 23 | ```bash |
| 24 | ffmpeg -i <input> -map_metadata -1 -vn -c:a pcm_s16le -ar 44100 <output.wav> |
| 25 | ``` |
| 26 | |
| 27 | No explicit channel-count option is used, so source mono/stereo layout remains |
| 28 | intact. |
| 29 | |
| 30 | The UI Audio asset page reports 50 files, while the current downloaded archive |
| 31 | contains 51 usable files under `Audio/`. This snapshot includes all 51 and does |
| 32 | not count the separate preview track. |
| 33 | |
| 34 | ## Kenney |
| 35 | |
| 36 | The source license files for both Kenney packs declare |
| 37 | [Creative Commons Zero (CC0 1.0)](https://creativecommons.org/publicdomain/zero/1.0/). |
| 38 | They permit personal, educational, and commercial use, and state that credit |
| 39 | to Kenney is appreciated but not mandatory. |
| 40 | |
| 41 | - Interface Sounds: created and distributed by Kenney, version 1.0, source |
| 42 | creation date 2020-02-11. |
| 43 | - UI Audio: created by Kenney Vleugels / Kenney.nl. |
| 44 | |
| 45 | ## BigSoundBank |
| 46 | |
| 47 | BigSoundBank identifies the selected files as |
| 48 | “CC0 (public domain): Free and royalty-free” and links them to its |
| 49 | [license page](https://bigsoundbank.com/licenses.html). The individual source |
| 50 | pages identify Joseph Sardin as the author. |
| 51 | |
| 52 | The snapshot contains exactly these sound IDs: |
| 53 | |
| 54 | - Whoosh: `0572`, `0573`, `1795`–`1802` |
| 55 | - Notification: `2059`–`2067` |
| 56 | - Chime: `2079`–`2091` |
| 57 | - Pencil signature: `3236`–`3238` |
| 58 | |
| 59 | Each entry in `sounds_index.json` records its individual BigSoundBank source |
| 60 | page. The library keeps the full recordings, including the two long whooshes |
| 61 | and longer chimes; the `recommended` flag keeps those outside the conservative |
| 62 | default discovery shortlist without removing them. |
| 63 | |
| 64 | ## CC0 terms |
| 65 | |
| 66 | CC0 1.0 lets the rights holder waive copyright and related rights to the |
| 67 | greatest extent allowed by law. It provides the work as-is and does not grant |
| 68 | patent, trademark, privacy, or publicity rights. See the bundled |
| 69 | [CC0 1.0 legal code](./CC0-1.0.txt), sourced from Creative Commons, or the |
| 70 | [official copy](https://creativecommons.org/publicdomain/zero/1.0/legalcode) |
| 71 | for the complete terms. |
| 72 |