Cleat alert sounds (assets/sounds/*.wav)
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Copyright (c) Zim Ventures LLC
Released under Creative Commons CC0 1.0 Universal (public domain dedication).

These three cues are NOT third-party assets. They are generated from first
principles by assets/sounds/generate_sounds.py, which is committed alongside
them — plain sine tones with a harmonic and a fade envelope, written for this
project. Nothing was sampled, downloaded, or derived from another work.

That was a deliberate choice over sourcing CC0 clips from a sound library. A
downloaded file carries provenance you cannot re-verify a year later, and an
attribution line you have to keep accurate. A generator carries neither: the
audio can be reproduced exactly, reviewed as source, and retuned without
hunting for a replacement under a compatible licence.

To regenerate:

    python3 assets/sounds/generate_sounds.py

CC0 1.0: https://creativecommons.org/publicdomain/zero/1.0/
