CAIRO: ECHOES OF TIME — IMMERSION RECORDINGS v1
Prepared 2026-10-18. Voluntary credits; no author endorses this game.
All sources offered CC0 1.0; permits copying, modification, distribution and commercial use.
CC0 deed: https://creativecommons.org/publicdomain/zero/1.0/
Legal code: https://creativecommons.org/publicdomain/zero/1.0/legalcode.en
All exports: mono 44.1kHz Ogg Vorbis. Detailed transformations and hashes: provenance.json.
No synthesized sound. No historical field-recording authenticity claim.

Cricket sounds
Author: syncopika
Files: crickets-01.ogg, crickets-02.ogg
Source: https://opengameart.org/content/cricket-sounds
Download: https://opengameart.org/sites/default/files/cricketsounds090613.wav
License: CC0-1.0 — https://creativecommons.org/publicdomain/zero/1.0/
Changes: Mono 44.1kHz; highpass=f=700,lowpass=f=9000; gain 1.877dB; 0.8s edge fades; Ogg Vorbis quality 4. No noise synthesis, music, or generated content.; Mono 44.1kHz; highpass=f=700,lowpass=f=9000; gain 1.901dB; 0.8s edge fades; Ogg Vorbis quality 4. No noise synthesis, music, or generated content.
Limitations: Publisher cautions recording quality is limited. Species and location not identified; not an Egyptian field recording. Source is not the linked music example.

pigeon walking and cooing.wav
Author: 5ro4 / Alva Majo
Files: pigeon-coo-01.ogg, pigeon-coo-02.ogg
Source: https://freesound.org/people/5ro4/sounds/701282/
Download: https://cdn.freesound.org/previews/701/701282_1629501-hq.mp3
License: CC0-1.0 — https://creativecommons.org/publicdomain/zero/1.0/
Changes: Mono 44.1kHz; highpass=f=130,lowpass=f=3800; gain -11.033dB; 0.12s edge fades; Ogg Vorbis quality 4. No noise synthesis, music, or generated content.; Mono 44.1kHz; highpass=f=130,lowpass=f=3800; gain -11.126dB; 0.12s edge fades; Ogg Vorbis quality 4. No noise synthesis, music, or generated content.
Limitations: Acquired public HQ MP3 preview, not login-protected lossless WAV. Excerpts may contain pigeon footsteps. Location unverified; not a Cairo recording.

Pigeons flying
Author: mcmikai
Files: pigeon-flight-01.ogg
Source: https://freesound.org/people/mcmikai/sounds/532180/
Download: https://cdn.freesound.org/previews/532/532180_9735871-hq.mp3
License: CC0-1.0 — https://creativecommons.org/publicdomain/zero/1.0/
Changes: Mono 44.1kHz; highpass=f=180,lowpass=f=7000; gain 1.045dB; 0.1s edge fades; Ogg Vorbis quality 4. No noise synthesis, music, or generated content.
Limitations: Acquired public HQ MP3 preview, not login-protected lossless WAV. No synchronized bird animation implied; occasional offscreen roof sound only.

Various Sound Effects
Author: laleksic
Files: wood-creak-01.ogg, wood-creak-02.ogg, shutter-close-01.ogg, shutter-close-02.ogg
Source: https://opengameart.org/node/143670
Download: https://opengameart.org/sites/default/files/sounds_8.zip
License: CC0-1.0 — https://creativecommons.org/publicdomain/zero/1.0/
Changes: Mono 44.1kHz; highpass=f=70,lowpass=f=5000; gain -1.516dB; 0.003s edge fades; Ogg Vorbis quality 4. No noise synthesis, music, or generated content.; Mono 44.1kHz; highpass=f=70,lowpass=f=5000; gain 5.698dB; 0.003s edge fades; Ogg Vorbis quality 4. No noise synthesis, music, or generated content.; Mono 44.1kHz; highpass=f=80,lowpass=f=6000; gain 1.797dB; 0.008s edge fades; Ogg Vorbis quality 4. No noise synthesis, music, or generated content.; Mono 44.1kHz; highpass=f=80,lowpass=f=6000; gain 9.802dB; 0.018s edge fades; Ogg Vorbis quality 4. No noise synthesis, music, or generated content.
Limitations: Door/floor-creak and door-close foley used as quiet historical wood/shutter proxies. They are not actual historical Cairo shutter recordings.

Random Sounds Samples — full steps stereo.ogg
Author: Augmentality (Brandon Morris); submitted by HaelDB
Files: distant-steps-01.ogg
Source: https://opengameart.org/content/random-sounds-samples
Download: https://opengameart.org/sites/default/files/full%20steps%20stereo.ogg
License: CC0-1.0 — https://creativecommons.org/publicdomain/zero/1.0/
Changes: Mono 44.1kHz; highpass=f=100,lowpass=f=2300; gain -7.208dB; 0.08s edge fades; Ogg Vorbis quality 4. No noise synthesis, music, or generated content.
Limitations: CC0 chosen from the publisher's offered CC0 / OGA-BY 3.0 licenses. Footwear/surface unspecified. This is a recorded footstep sequence, not a verified moving pass-by; perceived distance comes from spatial mixing. Never use as player footstep replacement.

Source pages were reviewed on 2026-10-18; snapshots and acquired originals are retained in the separate local production directory.
PERCEPTUAL REVIEW PENDING: source descriptions and technical waveform checks do not replace listening review.