Factory effects audio credits

Electric Buzz — themightyglider
Source: https://opengameart.org/content/electric-buzz
Download: https://opengameart.org/sites/default/files/buzz_0.ogg
License: CC0 1.0 Universal Public Domain Dedication
License URL: https://creativecommons.org/publicdomain/zero/1.0/
Author-listed upstream source: electric effects_.wav by soundtracvkradio
https://freesound.org/people/soundtracvkradio/sounds/394679/
Original SHA256: 4427905b12e7dbd35613a45ab3cf6b74b10816888db3446b3acbadbe36829dd8
Derived electrical_buzz.wav: 0.20-second excerpt starting at 0.10 seconds,
gain 3.2 (four times the earlier0.8 amplitude), peak limiter0.95,
10ms attack / 30ms release fades, mono 22050Hz PCM16.

Bubble Sound Effects — Brian MacIntosh (BMacZero)
Source: https://opengameart.org/content/bubble-sound-effects
Download: https://opengameart.org/sites/default/files/bubbles-loop1-amp.wav
License: CC0 1.0 Universal Public Domain Dedication
License URL: https://creativecommons.org/publicdomain/zero/1.0/
Original SHA256: 94eaef4afc1146dcdfd3077cc7a6cbe6dc97daac62b8f6560dfc913dd57488a9
Derived vat_bubbles.wav: full loop, gain 0.55, 30ms edge fades,
mono 22050Hz PCM16.

Retrieved 2026-10-10. Original downloads and source-page snapshots are
preserved in assets/audio/opengameart/. These files are separate from
Kenney assets and the user's supplied industrial ambience recording.

Catwalk creaks: three original damped metal resonances with filtered friction noise, synthesized in tools/generate.py; no third-party recording.

Emergency gas klaxon: original loud harmonic horn synthesized in tools/generate.py; no third-party recording.
Automated warning: user-supplied ElevenLabs Jessica recording of "Leak detected.", repeated three times; original MP3 preserved separately, complete final phrase then audio ends within five seconds. Not a Kenney asset.
