Deterrence sound credits
=====================

Every sound in this folder is built from real recordings. All shipped files are mono, 48 kHz Ogg Vorbis,
loudness-matched (ITU-R BS.1770) with true peaks at or below -1 dBFS, leading silence trimmed and tails faded.
Loops use a power-preserving (equal-power) crossfade of the end into the start.

Licences
--------
CC0 1.0 (public domain dedication): https://creativecommons.org/publicdomain/zero/1.0/
CC BY 4.0 (attribution required):   https://creativecommons.org/licenses/by/4.0/
NASA media: not subject to copyright in the United States (NASA Images and Media Usage Guidelines,
  https://www.nasa.gov/nasa-brand-center/images-and-media/). Courtesy NASA. NASA does not endorse this mod.

Sources
-------
[A] "Artemis II Live Launch Coverage - Pad Camera Site 4" - NASA/Lorne Mathre (Kennedy Space Center, 2026-04-01)
    https://images.nasa.gov/details/KSC-20260401-AU-LMM01-0001-Artemis_II_Live_Launch_Coverage_Pad_Camera_Site_4
    Public domain (NASA). Original 48 kHz WAV.
[B] "Artemis II Live Launch Coverage - Pad Camera Site 1" - NASA/Lorne Mathre (Kennedy Space Center, 2026-04-01)
    https://images.nasa.gov/details/KSC-20260401-AU-LMM01-0001-Artemis_II_Live_Launch_Coverage_Pad_CS1
    Public domain (NASA). Original 192 kHz float WAV; the launch segment (file time 455-535 s) was used.
[C] "Heavy explosion in forest debris tree falling.flac" - wyskoj - https://freesound.org/s/530163/ - CC0
[D] "Light explosion near in forest.flac" - wyskoj - https://freesound.org/s/530162/ - CC0
[E] "Explosion" - qubodup - https://freesound.org/s/182429/ - CC0 (from a US Government video, public domain)
[G] "G43-14-25 Distant Explosions.wav" - craigsmith - https://freesound.org/s/438693/ - CC0
[I] "R27-28-Big Cold Winter Wind.wav" - craigsmith - https://freesound.org/s/481148/ - CC0
[J] "G43-05-Small Rockslide.wav" - craigsmith - https://freesound.org/s/438684/ - CC0
[K] "R29-04-Crashing Collapse of Wood Building.wav" - craigsmith - https://freesound.org/s/487142/ - CC0
[L] "Geiger counter clicks (BG, NO RADIATION)" - cookies+policy - https://freesound.org/s/555922/ - CC0
[M] "Alarm, Air Raid Siren, Test, Devonport, Sony PCM M-10.wav" - audiojacked - https://freesound.org/s/336640/ - CC0
[N] "Setting Electronic Timer 1 Beep" - Rudmer_Rotteveel - https://freesound.org/s/536422/ - CC0
[O] "Pfeiffer Turbomolecular Vacuum Pump.wav" - tombenedict - https://freesound.org/s/397585/ - CC BY 4.0
[P] "dry_scroll_pump .wav" - 01me0w - https://freesound.org/s/477409/ - CC0
[Q] "Thunder Clap OWB KY 441x16.wav" - Dave Welsh - https://freesound.org/s/194364/ - CC0
[R] "230405 Thunder DRY rolling distant low rumbles, roof, EM272s, Toronto 7am" - TRP - https://freesound.org/s/717845/ - CC0
[S] "Distant rumbles" - richwise - https://freesound.org/s/584946/ - CC0
[T] "S16-23 Violent explosion and debris; 2 takes.wav" - craigsmith - https://freesound.org/s/674910/ - CC0
[U] "Windy Explosion.flac" - qubodup - https://freesound.org/s/182797/ - CC0 (from a US Government video, public domain)
[V] "shuttlelaunch.wav" - klangfabrik - https://freesound.org/s/220127/ - CC0 (a remix of public domain NASA recordings)
[X] "Artemis II Live Launch Coverage - Program (CH1) LOS (CH2)" - NASA (Kennedy Space Center, 2026-04-01)
    https://images.nasa.gov/details/KSC-20260401-AU-LMM01-0001-Artemis_II_Live_Launch_Coverage_Program_LOS
    Public domain (NASA). 40 s of the original 192 kbit/s MP3 around lift-off.
[Y] "LL-Q7737 (rus)-XANA000-<десять .. один, ноль>.wav" - XANA000, Lingua Libre (Wikimedia Commons) - CC0
    https://commons.wikimedia.org/wiki/File:LL-Q7737_(rus)-XANA000-%D0%B4%D0%B5%D1%81%D1%8F%D1%82%D1%8C.wav (and the other ten numbers)
[Z] "jsyd_klaxon.wav" - jbum - https://freesound.org/s/32088/ - CC0
[AA] "Sonic boom from Falcon 9 rocket landing" - g0ggs - https://freesound.org/s/668561/ - CC0
[AB] "Jet Plane Flyby.flac" - qubodup - https://freesound.org/s/189446/ - CC0
[AC] "C-RAM - Firing (+ Echo).mp3" - gurkenjaeger13 - https://freesound.org/s/621817/ - CC0
[AD] "Navy MK 15 Phalanx CIWS Anti-Air Fast Burst" - qubodup - https://freesound.org/s/163119/ - CC0 (from a US Navy video, public domain)
[AE] "M142 HIMARS Rocket Launch 8" - qubodup - https://freesound.org/s/854476/ - CC0 (from a DVIDS video, public domain)
[AF] "120mm Mortar Shell Shot 2" - qubodup - https://freesound.org/s/854478/ - CC0 (from a DVIDS video, public domain)
[AG] "Radar Dish" - naturenotesuk - https://freesound.org/s/716505/ - CC BY 4.0 (https://creativecommons.org/licenses/by/4.0/): excerpted, filtered and looped
[AH] "Buzzer_Alarm.wav" - Engineer_815 - https://freesound.org/s/524909/ - CC0
[AI] "G32-18-Radio Beeps.wav" - craigsmith - https://freesound.org/s/438502/ - CC0
[AJ] "50 Caliber MG.flac" - qubodup - https://freesound.org/s/183656/ - CC0 (from a US Government video, public domain)
[AK] "Howitzer Artillery Gun Shot Sound Effect 01" - qubodup - https://freesound.org/s/161343/ - CC0 (from a US Army video, public domain)
[AL] "R12-36-155mm Howitzer Fires.wav" - craigsmith - https://freesound.org/s/486030/ - CC0
[AM] "FireWorks_PortCarbon2004_FSP4816.wav" - ericstrausser - https://freesound.org/s/106219/ - CC0
[AN] "Launching Anti-Tank Missiles.flac" - qubodup - https://freesound.org/s/184274/ - CC0 (from a US Government video, public domain)
[AO] "Rocket Launch.flac" - qubodup - https://freesound.org/s/182794/ - CC0 (from a US Government video, public domain)
[AP] "G32-17-Electrical Buzz.wav" - craigsmith - https://freesound.org/s/438501/ - CC0
[AQ] "G39-27 - Oscillator Beeps with Reverb.wav" - craigsmith - https://freesound.org/s/438644/ - CC0
[W] "Strong wind" - lextrack - https://freesound.org/s/344887/ - CC0
Freesound sources were taken from their public high-quality previews.

Files
-----
missile_launch.ogg (11.6 s) - [A] + [B]
    RS-25 engine spool-up from [A] (1.05-1.89 s, raised 5-9 dB) as the ignition whoosh, cut at 0.8 s into the
    full-power roar and climb-out of [A] (11.4-22.2 s). [B] (file 470.0-475.6 s, de-clipped, 192->48 kHz) layered
    from 0.78 s for the booster ignition slam and low-end body. Progressive low-pass (20 kHz -> 1.5 kHz) and fade
    from 4.6 s for the climb; 28 Hz high-pass; gentle soft-clip and look-ahead limiting.
missile_loop.ogg (5.0 s loop) - [A] + [B]
    Full-power roar of [A] (11.6-17.6 s) over [B] (file 474.0-480.0 s); 1.0 s loop crossfade; 28 Hz high-pass; limiting.
explosion_near.ogg (3.4 s) - [D] + [E] + [J]
    [D] 0-3.4 s; low-passed (180 Hz) boom of [E] under it; gravel debris [J] (20.6-23.4 s) from 0.35 s;
    +3 dB low shelf, fade, limiting.
explosion_near2.ogg (3.9 s) - [C] + [E]
    [C] 0-3.9 s (blast, splinters, falling tree) with the low-passed boom of [E]; +3 dB low shelf, fade, limiting.
explosion_near3.ogg (3.4 s) - [E] + [C] + [K]
    Boom [E] 0-1.8 s, crack from [C] (first 0.14 s, 900 Hz high-pass), splintering wood [K] (0.18-3.3 s) from 0.12 s;
    fade, limiting.
explosion_distant.ogg / explosion_distant2.ogg / explosion_distant3.ogg (4.9 s each) - [G]
    Three single booms of [G] (13.97-18.85 s, 28.72-33.6 s, 34.25-39.1 s); +5 dB at 450 Hz, fade, limiting.
geiger1.ogg / geiger2.ogg / geiger3.ogg (26 ms each) - [L]
    Single Eberline E-120 tube clicks at 84.80 s, 96.83 s and 3.91 s; 40 Hz high-pass, 0.3 ms fade-in,
    speaker ring faded out from 8 ms; 96 -> 48 kHz.
siren.ogg (11.75 s loop) - [M]
    One rise-hold-fall wail of the siren (23.50-35.25 s), loop end phase-aligned by cross-correlation,
    0.35 s crossfade; 120 Hz high-pass.
bomb_beep.ogg (0.125 s) - [N]
    Varispeed 0.7 (4.1 kHz -> 2.9 kHz piezo tone, 70 -> 100 ms), trimmed, short fades.
centrifuge_loop.ogg (6.0 s loop) - [O] + [P]
    Turbomolecular pump [O] (20-40 s; 75,000 rpm rotor whine, 70 Hz high-pass) over the scroll backing pump [P]
    (60-80 s) at -5 dB; loop length phase-aligned on the rotor whine, 0.5 s crossfades.
    [O] "Pfeiffer Turbomolecular Vacuum Pump.wav" by tombenedict, CC BY 4.0, excerpted, filtered, mixed and looped.

Layered blast audio (round 3, built by art/sounds/build_blast_sounds.py)
------------------------------------------------------------------------
blast_crack1.ogg / blast_crack2.ogg / blast_crack3.ogg (1.3 s each) - [Q] / [T] / [U]
    The crack of a strong shock close by: the thunder clap of [Q] (14.0-16.0 s), take 1 of [T] (0.40-2.4 s) and [U]
    (0.35-2.4 s), de-clipped, started where the envelope rises to its peak, 90 Hz high-pass, exponential decay, with a
    synthesized Friedlander blast pulse (p = exp(-t/tau) (1 - t/tau), tau 5-8 ms) and a 30 ms broadband burst on the front.
blast_near1.ogg (7.5 s) / blast_near2.ogg (9.0 s) / blast_near3.ogg (7.2 s) - [T] / [U] / [T]
    The blast close by: [T] take 1 (0.40-8.4 s), [U] (0.35-12.2 s) and [T] take 2 (12.5-19.9 s), de-clipped, over a
    synthesized sub-bass glide (54/48/42 Hz down to 27 Hz); +2.5 dB low shelf at 110 Hz, 25 Hz high-pass, fade, limiting.
blast_far1.ogg (7.5 s) / blast_far2.ogg (9.2 s) / blast_far3.ogg (9.1 s) - [G] / [R] / [S]
    Heard from far away: the long, very deep boom of [G] (5.8-13.5 s), the dry thunder strike and roll of [R]
    (150.8-160.0 s) and the rolling rumbles of [S] (44.4-53.5 s), over a sub glide (46 to 24 Hz); 1.1 kHz low-pass
    (4th order), +3 dB at 85 Hz, 24 Hz high-pass, fade, limiting.
blast_rumble.ogg (45.0 s loop) - [R]
    Dry rolling thunder (45.0-93.0 s); 25 Hz high-pass, 2.8 kHz low-pass, its slow level swings evened out
    (gain ~ (envelope / median)^-0.4), 3 s correlation-matched loop crossfade.
blast_roar.ogg (19.7 s loop) - [V]
    The Space Shuttle launch roar of [V] (30.0-46.0 s) at varispeed 0.72; 25 Hz-2.6 kHz, +3 dB low shelf at 120 Hz,
    evened, 2.5 s loop crossfade.
blast_wind.ogg (17.1 s loop) - [W] + [I]
    The desert gale of [W] (0-19.6 s) over the winter wind of [I] (20.0-39.6 s) at -5 dB; 50 Hz high-pass, evened,
    2.5 s loop crossfade.
blast_debris1.ogg / blast_debris2.ogg / blast_debris4.ogg (4.0 s each) - [J]
    Rubble and gravel falling (4.0-8.4 s, 20.0-24.4 s, 8.0-12.4 s); 80 Hz high-pass, fades, limiting.
blast_debris3.ogg (4.0 s) - [K]
    Splintering wood (0.15-4.4 s); 80 Hz high-pass, fades, limiting.
fire_roar.ogg (12.5 s loop) - synthesized, no recording
    A flickering low roar (low-passed noise under slow random modulation), crackle (many short pops with heavy-tailed
    sizes, bunched when the fire flares), occasional wood snaps and a little hiss; 1.5 s loop crossfade.
countdown_en.ogg (11.4 s) - X
    The NASA launch commentator's final count ("T-minus ten" to "booster ignition") from the program channel, placed so the
    boosters' ignition falls at 11.0 s; 200 Hz-7 kHz, presence lift at 2.6 kHz, -17 LUFS, limiting.
countdown_ru.ogg (11.4 s) - Y
    Eleven words placed one a second, "десять" at 1.0 s to "ноль" at 11.0 s; the same public-address treatment.
launch_klaxon.ogg (6.0 s) - Z
    Three klaxon blasts, 120 Hz high-pass, -13 LUFS, fade, limiting.
warhead_boom.ogg (5.0 s) - AA
    The Falcon 9 stage's double boom and its rumble, 22 Hz high-pass, fades, limiting: the Titan II warhead's sonic boom.
warhead_roar.ogg (4.1 s) - AB
    The jet's approach up to its loudest moment, 30 Hz high-pass, fade-in, limiting: a subsonic warhead's roar.
ciws_fire1.ogg (5.1 s) - AC
    The C-RAM's burst and its own echo, 30 Hz high-pass, limiting: the CIWS firing.
ciws_fire2.ogg (5.5 s) - AD
    The Phalanx's burst and its echo, the same treatment: the CIWS's second variant.
sam_launch.ogg (5.9 s) - AE
    The rocket's ignition and roar, 25 Hz high-pass, fade-out, limiting: a SAM's launch.
sam_eject.ogg (1.8 s) - AF
    The mortar's thump, 25 Hz high-pass, fades, limiting: a vertical launcher's cold launch.
radar_turn.ogg (11.4 s loop) - AG
    The antenna's drive and turning reflector, 1.4 kHz low-pass and 35 Hz high-pass, looped: the radars turning.
threat_alarm.ogg (2.0 s) - AH
    Two seconds of the buzzer, 120 Hz high-pass, fades, limiting: the INCOMING warning.
radar_blip.ogg (0.25 s) - AI
    One beep of the radio (1.43 kHz, 14.39-14.64 s), 300 Hz high-pass, short fades: the console's blip on a hostile.
flak_fire1.ogg (0.7 s), flak_fire2.ogg (3.3 s) - AK, AL
    A howitzer's shot (0.08-0.8 s), and a 155 mm's shot and rumble (8.25-11.5 s), 25 Hz high-pass, fades, limiting: the flak cannon.
flak_burst1.ogg to flak_burst3.ogg (2.4 s each) - AM
    Three deep shell bursts overhead (2.2, 42.24 and 59.69 s), 30 Hz high-pass, fades, limiting: flak bursting.
quad_fire1.ogg, quad_fire2.ogg (2.0 s each) - AJ
    Two bursts of the .50 cal (1.88-3.9 s, 6.72-8.75 s), de-clipped, 40 Hz high-pass, fades, limiting: the quad gun.
abm_launch.ogg (5.8 s) - AO
    The rocket's ignition and climb (0.5-6.3 s), 25 Hz high-pass, fades, limiting: the long-range ABM.
manpads_launch.ogg (3.4 s) - AN
    A shoulder-fired missile's launch (0-3.4 s), 35 Hz high-pass, fades, limiting.
manpads_seek.ogg (1.8 s loop), manpads_lock.ogg (1.2 s loop) - AQ
    The oscillator's 620 Hz tone (27.95-28.95 s), its decay evened out and phase-aligned into a loop, raised a fourth and
    cut into pulses about 11 a second (the seeker's growl), or raised further and held (the lock).
emp_buzz.ogg (2.2 s) - AP
    The buzz (12.0-14.2 s), 60 Hz high-pass, fades, limiting: electronics frying in an EMP.
jammer_hum.ogg (4.0 s loop) - AP
    Its 120 Hz hum and hiss (21.0-25.5 s), 60 Hz high-pass, 0.5 s loop crossfade: the jammer.
