{
  "bank_counts": {
    "lift": 2,
    "burst": 3,
    "small": 2,
    "ember": 0
  },
  "auditioned": false,
  "stems": [
    {
      "name": "launch-mortar-a",
      "file": "lift-1.wav",
      "role": "launch",
      "status": "preferred",
      "source_id": 161687,
      "source_url": "https://freesound.org/people/jppi_Stu/sounds/161687/",
      "source_title": "sw_Fireworks_Mortar_03.wav by jppi_Stu",
      "author": "jppi_Stu",
      "license_url": "https://creativecommons.org/licenses/by/4.0/",
      "download_url": "https://cdn.freesound.org/previews/161/161687_56518-hq.mp3",
      "source_preview_format": "MP3 VBR, 44100 Hz, 2 channel(s), approx 184 kbps",
      "trim_start_seconds": 0.263,
      "trim_end_seconds": 0.77,
      "duration_seconds": 0.5070068027210884,
      "sample_rate": 44100,
      "channels": 1,
      "format": "WAV PCM 16-bit",
      "peak_dbfs": -3,
      "applied_gain_db": 4.603253802546813,
      "approx_onset_seconds": 0.003945578231292517,
      "reason": "The source author explicitly describes mortar launch followed by explosion. This is the first isolated impulse, about 2 seconds before the large burst. Strong inference from sequence and source description; no auditory verification.",
      "auditioned": false,
      "sha256": "3381affd874fa995d701e38abea070581bf2a6cf1fd2b512b9b6d61af9cb6290",
      "runtime_name": "lift-1",
      "processing": "Mono mixdown; DC removal; 0.5 ms opening and 40 ms ending fades; peak normalization to -3 dBFS; no added reverb or synthesized layers."
    },
    {
      "name": "launch-denoised",
      "file": "lift-2.wav",
      "role": "launch",
      "status": "preferred",
      "source_id": 81455,
      "source_url": "https://freesound.org/people/csengeri/sounds/81455/",
      "source_title": "fireworks_launch_denoised.wav by csengeri",
      "author": "csengeri",
      "license_url": "https://creativecommons.org/licenses/by/4.0/",
      "download_url": "https://cdn.freesound.org/previews/81/81455_197070-hq.mp3",
      "source_preview_format": "MP3 VBR, 44100 Hz, 1 channel(s), approx 168 kbps",
      "trim_start_seconds": 0.008,
      "trim_end_seconds": 0.54,
      "duration_seconds": 0.5319954648526077,
      "sample_rate": 44100,
      "channels": 1,
      "format": "WAV PCM 16-bit",
      "peak_dbfs": -3,
      "applied_gain_db": -2.505068617732737,
      "approx_onset_seconds": 0.012789115646258504,
      "reason": "Author explicitly calls the entire source a denoised firework launch. Small recorder/MP3-player provenance; mortar subtype not stated.",
      "auditioned": false,
      "sha256": "268e64153256fc908263830fe69d6fe5dddc146df926bf9304916d7c27205005",
      "runtime_name": "lift-2",
      "processing": "Mono mixdown; DC removal; 0.5 ms opening and 40 ms ending fades; peak normalization to -3 dBFS; no added reverb or synthesized layers."
    },
    {
      "name": "burst-mortar-a",
      "file": "burst-1.wav",
      "role": "burst",
      "status": "preferred",
      "source_id": 161687,
      "source_url": "https://freesound.org/people/jppi_Stu/sounds/161687/",
      "source_title": "sw_Fireworks_Mortar_03.wav by jppi_Stu",
      "author": "jppi_Stu",
      "license_url": "https://creativecommons.org/licenses/by/4.0/",
      "download_url": "https://cdn.freesound.org/previews/161/161687_56518-hq.mp3",
      "source_preview_format": "MP3 VBR, 44100 Hz, 2 channel(s), approx 184 kbps",
      "trim_start_seconds": 2.264,
      "trim_end_seconds": 3.9,
      "duration_seconds": 1.6360090702947845,
      "sample_rate": 44100,
      "channels": 1,
      "format": "WAV PCM 16-bit",
      "peak_dbfs": -3,
      "applied_gain_db": -6.121835309905521,
      "approx_onset_seconds": 0.01600907029478458,
      "reason": "The large second impulse is the explosion after the source-described mortar launch. Tail ends before source ends.",
      "auditioned": false,
      "sha256": "9f16bfff132fc07353ca5ffcd3bf4772a6acdb5c4594e5b2c39be00ba3efdb97",
      "runtime_name": "burst-1",
      "processing": "Mono mixdown; DC removal; 0.5 ms opening and 40 ms ending fades; peak normalization to -3 dBFS; no added reverb or synthesized layers."
    },
    {
      "name": "burst-mortar-b",
      "file": "burst-2.wav",
      "role": "burst",
      "status": "preferred",
      "source_id": 161688,
      "source_url": "https://freesound.org/people/jppi_Stu/sounds/161688/",
      "source_title": "sw_Fireworks_Mortar_02.wav by jppi_Stu",
      "author": "jppi_Stu",
      "license_url": "https://creativecommons.org/licenses/by/4.0/",
      "download_url": "https://cdn.freesound.org/previews/161/161688_56518-hq.mp3",
      "source_preview_format": "MP3 VBR, 44100 Hz, 2 channel(s), approx 182 kbps",
      "trim_start_seconds": 2.49,
      "trim_end_seconds": 3.68,
      "duration_seconds": 1.19,
      "sample_rate": 44100,
      "channels": 1,
      "format": "WAV PCM 16-bit",
      "peak_dbfs": -3,
      "applied_gain_db": -6.0855278240172614,
      "approx_onset_seconds": 0.015351473922902495,
      "reason": "Largest distinct explosion in source described as mortar launch/explosion with distant fireworks. Cut before the separate 3.83 s impulse. Some distant ambience may remain.",
      "auditioned": false,
      "sha256": "294eb6dc0223de633f7e2b7b73575ba2c34a9a9bd259634be4ee65a3fc04b26c",
      "runtime_name": "burst-2",
      "processing": "Mono mixdown; DC removal; 0.5 ms opening and 40 ms ending fades; peak normalization to -3 dBFS; no added reverb or synthesized layers."
    },
    {
      "name": "burst-mortar-c",
      "file": "burst-3.wav",
      "role": "burst",
      "status": "preferred",
      "source_id": 161685,
      "source_url": "https://freesound.org/people/jppi_Stu/sounds/161685/",
      "source_title": "sw_Fireworks_Mortar_01.wav by jppi_Stu",
      "author": "jppi_Stu",
      "license_url": "https://creativecommons.org/licenses/by/4.0/",
      "download_url": "https://cdn.freesound.org/previews/161/161685_56518-hq.mp3",
      "source_preview_format": "MP3 VBR, 44100 Hz, 2 channel(s), approx 182 kbps",
      "trim_start_seconds": 2.923,
      "trim_end_seconds": 4.78,
      "duration_seconds": 1.8570068027210884,
      "sample_rate": 44100,
      "channels": 1,
      "format": "WAV PCM 16-bit",
      "peak_dbfs": -3,
      "applied_gain_db": -5.794231528653363,
      "approx_onset_seconds": 0.020612244897959184,
      "reason": "Largest distinct explosion in source described as mortar launch/explosion with distant fireworks. Cut before the separate 5.0 s impulse. Some distant ambience may remain.",
      "auditioned": false,
      "sha256": "92b8a53137d9021aeed4c21024cd8e22b24d47d534d1f55d9e34edecb9f2c4c6",
      "runtime_name": "burst-3",
      "processing": "Mono mixdown; DC removal; 0.5 ms opening and 40 ms ending fades; peak normalization to -3 dBFS; no added reverb or synthesized layers."
    },
    {
      "name": "burst-small-a",
      "file": "small-1.wav",
      "role": "small-burst",
      "status": "preferred",
      "source_id": 336005,
      "source_url": "https://freesound.org/people/Rudmer_Rotteveel/sounds/336005/",
      "source_title": "Sharp Explosion 2 (of 5) by Rudmer_Rotteveel",
      "author": "Rudmer_Rotteveel",
      "license_url": "https://creativecommons.org/publicdomain/zero/1.0/",
      "download_url": "https://cdn.freesound.org/previews/336/336005_4921277-hq.mp3",
      "source_preview_format": "MP3 VBR, 44100 Hz, 2 channel(s), approx 190 kbps",
      "trim_start_seconds": 0,
      "trim_end_seconds": 0.68,
      "duration_seconds": 0.68,
      "sample_rate": 44100,
      "channels": 1,
      "format": "WAV PCM 16-bit",
      "peak_dbfs": -3,
      "applied_gain_db": -3.4871209972782697,
      "approx_onset_seconds": 0.002471655328798186,
      "reason": "Author explicitly says this is a single firework explosion isolated from a longer recording. Short compact envelope.",
      "auditioned": false,
      "sha256": "a69f9241c6ecc1de2fbcab9fd9b5874ffc60ef856dcfe34405273f42197e1d82",
      "runtime_name": "small-1",
      "processing": "Mono mixdown; DC removal; 0.5 ms opening and 40 ms ending fades; peak normalization to -3 dBFS; no added reverb or synthesized layers."
    },
    {
      "name": "burst-small-c",
      "file": "small-2.wav",
      "role": "small-burst",
      "status": "preferred",
      "source_id": 336011,
      "source_url": "https://freesound.org/people/Rudmer_Rotteveel/sounds/336011/",
      "source_title": "Sharp Explosion 4 (of 5) by Rudmer_Rotteveel",
      "author": "Rudmer_Rotteveel",
      "license_url": "https://creativecommons.org/publicdomain/zero/1.0/",
      "download_url": "https://cdn.freesound.org/previews/336/336011_4921277-hq.mp3",
      "source_preview_format": "MP3 VBR, 44100 Hz, 2 channel(s), approx 187 kbps",
      "trim_start_seconds": 0,
      "trim_end_seconds": 0.75,
      "duration_seconds": 0.75,
      "sample_rate": 44100,
      "channels": 1,
      "format": "WAV PCM 16-bit",
      "peak_dbfs": -3,
      "applied_gain_db": -2.190839300950846,
      "approx_onset_seconds": 0.00709750566893424,
      "reason": "Author explicitly says this is a single firework explosion isolated from a longer recording. Short compact envelope.",
      "auditioned": false,
      "sha256": "4f19b87bdac60c6fce520d47c3c392e566728059e52dd6033056109088f4edef",
      "runtime_name": "small-2",
      "processing": "Mono mixdown; DC removal; 0.5 ms opening and 40 ms ending fades; peak normalization to -3 dBFS; no added reverb or synthesized layers."
    }
  ],
  "playback": {
    "unitScale": "Art-directed 2 metres per scene unit; not surveyed acoustics",
    "delay": "Moving-listener fixed-point propagation per individual launch, main burst and delayed child cluster, at343m/s",
    "spatial": "World-space HRTF; continuous camera listener yaw/pitch/position, distance gain and air lowpass",
    "defaultVolume": 0.32,
    "clock": "One audio output clock for scene and events, using getOutputTimestamp when available, outputLatency fallback",
    "mix": "Gentle peak compressor and bounded soft ceiling; no synthetic replacement or reverb wash",
    "limitations": "No perceptual listening or physical Safari/iPhone/speaker/Bluetooth verification. Public HQ MP3 previews, not original lossless WAV. Quiet recorded distant ambience may remain."
  }
}