# Crossline audio provenance

These locally served recordings are CC0. No account, streaming service or paid library is used during play.

All three files use AK-47 recordings from **The Free Firearm Sound Library**, recorded by **Ben Jaszczak, Brian Nelson, Kevin Heras and Matthew Nanney**. [Original release and CC0 declaration](https://opengameart.org/content/the-free-firearm-sound-library). [Public archive mirror and recording metadata](https://github.com/buddingmonkey/FreeFirearmsSFXLibrary).

- **Shots:** two near-distance takes from `Prepared SFX/AK-47/C_28P.wav`, trimmed at 0.58s and 3.22s to 1.35 seconds each. Stereo is retained, gain is reduced to 0.6, and a 0.2-second tail fade begins at 1.15s. Playback selects either take at its original speed. There is no added EQ, reverb, synthetic layer or pitch variation.
- **Reload:** real AK-47 empty-magazine removal (`Master Tracks/AK-47/C_11.wav`), insertion (`C_10.wav`) and slide-cycle (`C_14.wav`) recordings. Excerpts start at 0.28s, 0.28s and 0.34s and last 0.25s, 0.27s and 0.36s respectively. They begin at 0.20s, 0.98s and 1.18s in the final 1.6-second reload. Gain reductions of 0.6, 0.6 and 0.55 and short end fades preserve the recorded mechanical transients. Playback pauses and resumes with authoritative reload progress.

Distributed files are stereo 48kHz 16-bit PCM WAV. Runtime master gain and a peak limiter control overlapping shot tails. The stylized Quaternius rifle is AK-pattern; its source does not identify an exact real-world variant.

Source downloads (2026-10-01):

- https://raw.githubusercontent.com/buddingmonkey/FreeFirearmsSFXLibrary/main/Prepared%20SFX/AK-47/C_28P.wav
- https://raw.githubusercontent.com/buddingmonkey/FreeFirearmsSFXLibrary/main/Master%20Tracks/AK-47/C_11.wav
- https://raw.githubusercontent.com/buddingmonkey/FreeFirearmsSFXLibrary/main/Master%20Tracks/AK-47/C_10.wav
- https://raw.githubusercontent.com/buddingmonkey/FreeFirearmsSFXLibrary/main/Master%20Tracks/AK-47/C_14.wav

[CC0 1.0 Universal](https://creativecommons.org/publicdomain/zero/1.0/). No endorsement is implied. No proprietary game audio is used.

SHA-256 of distributed files:

- `ak47-shot-1-8f2b986d6d.wav`: `8f2b986d6d2e4e22a06cfe825c6feb8f592498b41cccae80a4a774ddd74f8b1c`
- `ak47-shot-2-39946610b0.wav`: `39946610b067318c0d77912eaaedd6255d973fba1096de2d7f6391bbb31bb1b2`
- `ak47-reload-d5c4b39405.wav`: `d5c4b3940576665e67d81d55663ab8bc5c3f519e2c27dddae38eacf17bb1ed8c`