# Sound effects

Kenney: Impact Sounds (1.0, 2019) and Sci-fi Sounds (1.0, 2020).
License: Creative Commons Zero / CC0. Commercial use and redistribution permitted.
Sources: https://kenney.nl/assets/impact-sounds and https://kenney.nl/assets/sci-fi-sounds
License: https://creativecommons.org/publicdomain/zero/1.0/

Source files were converted from Ogg to mono PCM16 WAV, peak-normalized, and given a 15ms end fade. File mapping is recorded in build-audio.py. Runtime adds pitch variation, layered impacts and limiting. Downloaded 2026-09-30.
# BGM: Savage Ambush

Author: Ruskerdax. License: CC0 (commercial use and modification permitted).
Source: https://opengameart.org/content/savage-ambush
Original: https://opengameart.org/sites/default/files/ruskerdax_-_savage_ambush.mp3
Downloaded 2026-09-30. Used as looping match music with runtime volume/filter changes.

# Previous match BGM

"Raving Energy (faster)" Kevin MacLeod (incompetech.com)
Licensed under Creative Commons: By Attribution 4.0 License
https://creativecommons.org/licenses/by/4.0/
Source: https://incompetech.com/music/royalty-free/index.html?Search=Search&isrc=USUAN1900012
Used in a loop with runtime volume and filter changes. Downloaded 2026-09-30.

# Current match BGM: Instant Impact

User-supplied Stable Audio mix, provided for use as the game's match BGM on 2026-10-09.
Source filename: Instant-Impact-mixdown-00-00_03-27-1x.wav (3:27, stereo, 44.1 kHz).
Source page: https://stableaudio.com/st-1/b39865637a2447af80248c54312957aa
Converted to VBR MP3 with peak headroom and 8 ms endpoint fades; full composition retained.
Looped during matches with runtime volume ducking for gameplay effects.
Stable Audio usage information: https://kb.stability.ai/knowledge-base/stable-audio-commerical-and-usage-licensing
This supplied track is not designated CC0 or Creative Commons by this project.