Tap Tavern lobby (game library) audio
The original files in the first table are CC0 1.0 (public domain dedication, https://creativecommons.org/publicdomain/zero/1.0/).
Licences checked on 2026-10-14: the Kenney pack via its page (kenney.nl/assets/interface-sounds, "Creative Commons CC0")
and the License.txt inside the zip ("License: (Creative Commons Zero, CC0)"); the music via the OpenGameArt
"License(s): CC0" field. Files are copied unmodified (renamed only); nothing from the downloads was executed.

File           | Pack / title (original file)                      | Author             | Source                                          | License
---------------|---------------------------------------------------|--------------------|-------------------------------------------------|--------
music-main.ogg | Lofi Hip Hop Loop (LofiLoop_2.ogg)                | omfgdude (OMF-Games) | https://opengameart.org/content/lofi-hip-hop-loop | CC0 1.0
sfx-join.ogg   | Interface Sounds / Audio/glass_001.ogg            | Kenney (kenney.nl) | https://kenney.nl/assets/interface-sounds        | CC0 1.0
sfx-leave.ogg  | Interface Sounds / Audio/minimize_008.ogg         | Kenney (kenney.nl) | https://kenney.nl/assets/interface-sounds        | CC0 1.0
sfx-back.ogg   | Interface Sounds / Audio/pluck_002.ogg            | Kenney (kenney.nl) | https://kenney.nl/assets/interface-sounds        | CC0 1.0
sfx-ready.ogg  | Interface Sounds / Audio/confirmation_001.ogg     | Kenney (kenney.nl) | https://kenney.nl/assets/interface-sounds        | CC0 1.0
sfx-full.ogg   | Interface Sounds / Audio/confirmation_002.ogg     | Kenney (kenney.nl) | https://kenney.nl/assets/interface-sounds        | CC0 1.0

Credit is not required by CC0; given as a courtesy ("Lofi Hip Hop Loop by OMF-Games", "Interface Sounds by Kenney").

October 2026 game-night lounge upgrade (mixed CC BY 4.0 / CC0):
music-gathering.ogg | George Street Shuffle | Kevin MacLeod (incompetech.com) | https://incompetech.com/music/royalty-free/index.html?isrc=USUAN1300035 | CC BY 4.0
music-afterhours.ogg | Airport Lounge | Kevin MacLeod (incompetech.com) | https://incompetech.com/music/royalty-free/index.html?isrc=USUAN1100806 | CC BY 4.0
Licensed under Creative Commons: By Attribution 4.0 License, https://creativecommons.org/licenses/by/4.0/
Music downloaded directly from the composer's mp3-royaltyfree directory; full arrangements retained, loudness normalized, gentle beginning/end fades, OGG encoding. Two tracks rotate naturally and alternate on hub entry. Original music-main.ogg remains for compatibility and its original credit above still applies.
sfx-join-2.ogg | Interface Sounds / glass_001, pitched and filtered variant | Kenney | https://kenney.nl/assets/interface-sounds | CC0
sfx-join-3.ogg | Interface Sounds / glass_001, pitched and filtered variant | Kenney | https://kenney.nl/assets/interface-sounds | CC0
sfx-back-2.ogg | Interface Sounds / pluck_002, pitched and filtered variant | Kenney | https://kenney.nl/assets/interface-sounds | CC0
sfx-back-3.ogg | Interface Sounds / pluck_002, pitched and filtered variant | Kenney | https://kenney.nl/assets/interface-sounds | CC0
sfx-select.ogg | RPG Audio / clothBelt, trimmed and filtered card movement | Kenney | https://kenney.nl/assets/rpg-audio | CC0

Soundboard (all freely overlapping, no cooldown):
board-boo-1.ogg, board-boo-2.ogg, board-boo-3.ogg | Booing Crowd (2.2-second excerpts at 5, 17 and 28 seconds) | NeoSpica | https://freesound.org/people/NeoSpica/sounds/504621/ | CC0
Source: the creator's publicly available high-quality MP3 preview, https://cdn.freesound.org/previews/504/504621_7704891-hq.mp3 . The sound page explicitly identifies CC0.
board-cheer-1.ogg, board-cheer-2.ogg | Cheers / cheers_1 | Nocturnal_Vanguard (AuraVoice) | https://opengameart.org/content/cheers-0 | CC0
board-applause-1.ogg, board-applause-2.ogg | Applause in a large hall or church | eXpl0it3r | https://opengameart.org/content/applause-in-a-large-hall-or-church | CC0
board-honk-1.ogg, board-honk-2.ogg | original Tap Tavern air horn from derby-audio | Tap Tavern | generated locally | CC0
board-whistle-1.ogg, board-whistle-2.ogg | original Tap Tavern three-note whistle from tower-audio | Tap Tavern | generated locally | CC0
Soundboard adaptations: short excerpts, gentle fades, filtering, small pitch variants, and loudness normalization. These changes do not imply endorsement by the source artists.
Build recipe: .tools/build-hub-audio.py. File manifest: upgrade-manifest.json.