{
  "schemaVersion": 1,
  "preparedOn": "2026-09-30",
  "generator": "tools/prepare-cururo.mjs",
  "id": "cururo",
  "retrievedOn": "2026-09-30",
  "title": "Spalacopus cyanus — iNaturalist observation 358472130, sound 1927643",
  "species": "Spalacopus cyanus",
  "author": "Ariel Cabrera Foix",
  "recordingDate": "2026-04-29",
  "recordingLocation": "Limarí Province, Coquimbo, Chile",
  "observationId": 358472130,
  "soundId": 1927643,
  "taxonId": 45913,
  "sourcePage": "https://www.inaturalist.org/observations/358472130",
  "metadataUrl": "https://api.inaturalist.org/v1/observations/358472130",
  "metadataFile": "inaturalist-358472130.json",
  "originalUrl": "https://static.inaturalist.org/sounds/1927643.wav?1777942674",
  "downloadUrl": "https://s3.amazonaws.com/static.inaturalist.org/sounds/1927643.wav",
  "downloadNote": "Public S3 endpoint for the same static.inaturalist.org media bucket. No authentication, token or hidden media extraction.",
  "originalFile": "ariel-cabrera-foix-spalacopus-cyanus-original.wav",
  "expectedOriginalSha256": "c33dc6e81a1baee39f53e18326656468a821c64d3b2dfdab747210cefbeb565a",
  "license": "CC BY-NC 4.0",
  "licenseCode": "cc-by-nc",
  "licenseUrl": "https://creativecommons.org/licenses/by-nc/4.0/",
  "derivativeLicense": "CC BY-NC 4.0",
  "derivativeLicenseUrl": "https://creativecommons.org/licenses/by-nc/4.0/",
  "licenseEvidence": "The sound 1927643 license_code is cc-by-nc, independently of the observation license. The saved official iNaturalist Shared::LicenseModule maps CC_BY_NC through CC_VERSION 4.0 to the license URL.",
  "licenseMappingUrl": "https://raw.githubusercontent.com/inaturalist/inaturalist/main/app/models/shared/license_module.rb",
  "licenseMappingFile": "inaturalist-license-module.txt",
  "identificationEvidence": "The observation and community taxon are both 45913 Spalacopus cyanus; quality_grade is research. Four current species identifications comprise the initial improving identification and three supporting identifications. Sound and observation have no flags in the saved response.",
  "selectionReason": "Research-grade community identification with three agreements and an uncompressed PCM16 mono WAV source, already only about four seconds long. This is a metadata/technical choice, not a claim that it was auditioned or is the acoustically best recording.",
  "attribution": "Cururo (Spalacopus cyanus), grabación de Ariel Cabrera Foix, Limarí, Coquimbo, Chile, 29 de abril de 2026. iNaturalist 358472130 / sonido 1927643. CC BY-NC 4.0. Adaptación: conversión a mono 22050 Hz, fundidos y ajuste de nivel; un fragmento con silencios dentro de un ciclo de 22 segundos. Uso no comercial.",
  "output": "fauna-cururo.wav",
  "durationSeconds": 22,
  "placementSeconds": 3,
  "fadeSeconds": 0.25,
  "targetRms": 0.024,
  "peakLimit": 0.3,
  "fallbackPeakFilter": "alimiter=limit=0.45:attack=5:release=80:level=false:latency=true",
  "scope": "A real modern recording identified by the iNaturalist community as Spalacopus cyanus, recorded in Limarí, not Tagua Tagua. Its museum use is evocative. Archaeological evidence at TT3 is Spalacopus sp.; this recording does not resolve that fossil evidence to S. cyanus or reproduce a Pleistocene soundscape.",
  "noncommercialRuling": {
    "date": "2026-09-30",
    "contextConfirmedByResponsible": "Museo de difusión científica sin fines comerciales, confirmado por el responsable el 2026-09-30.",
    "decision": "CC BY-NC recordings are eligible for this specifically noncommercial science-outreach museum. Preserve attribution, license link and modification notice. This decision does not authorize commercial reuse, remove the NC restriction or license unrelated files.",
    "commercialReuseAllowed": false
  },
  "original": {
    "path": "audio-sources/cururo/ariel-cabrera-foix-spalacopus-cyanus-original.wav",
    "bytes": 357116,
    "sha256": "c33dc6e81a1baee39f53e18326656468a821c64d3b2dfdab747210cefbeb565a",
    "sourceFormat": "PCM_S16LE mono 44100 Hz",
    "decodedDurationSeconds": 4.04843537414966,
    "decodedMetrics": {
      "peak": 0.706670880317688,
      "rms": 0.10286111438895085,
      "dcOffset": 3.754671676609283e-7,
      "zeroFrames": 0
    }
  },
  "metadataSha256": "8a30adff2f71b27239f3d4045a03558f8d82575d7aa6b2407f0529fc2872bf0e",
  "licenseMappingSha256": "4f13be6e7aaf8f93d910b764463ce42449abccea21de9a6535e606a60f964965",
  "derivative": {
    "path": "assets/audio/fauna-cururo.wav",
    "format": "PCM_S16LE",
    "channels": 1,
    "sampleRate": 22050,
    "bitsPerSample": 16,
    "durationSeconds": 22,
    "bytes": 970244,
    "sha256": "c243bfadcc6204a66d4723134ed5f8d9fa163c0c6c699f42c31aae71b19e890a",
    "metrics": {
      "peak": 0.277191162109375,
      "rms": 0.023999261069519204,
      "dcOffset": -0.00000735246528180401,
      "zeroFrames": 396071
    },
    "linearGain": 0.573387865084011,
    "fadeCurve": "squared-sine",
    "fadeSeconds": 0.25,
    "excerptSourceSeconds": [
      0,
      4.04843537414966
    ],
    "activeWindowSeconds": [
      3,
      7.04843537414966
    ],
    "placementsSeconds": [
      3
    ],
    "appliedPeakFilter": null
  },
  "modifications": "Original recording downsampled to mono 22050 Hz; DC offset removed; squared-sine fades; one placement of the complete source fragment with genuine digital silence around it; whole-cycle RMS normalization; PCM16 encoding. No repeated call within the cycle, pitch shift, time stretching or synthetic animal call.",
  "claimRecord": {
    "support": "Saved primary sound-specific metadata and official license mapping support attribution, location, community identification and CC BY-NC 4.0. Original and derivative hashes pin the actual media; PCM tests support levels, format and sparse timing.",
    "changesAfterInspection": "No diagnostic adjustment was needed after the initial signal measurements.",
    "unresolved": "No human audition, physical playback test or independent expert species identification performed. Community identification and technical measurements do not prove the absence of background speech or the acoustic authenticity of a prehistoric scene. Integration-level listening remains for the host.",
    "decision": "The user's explicit 2026-09-30 noncommercial museum ruling permits this CC BY-NC adaptation in that declared context. NC restrictions, attribution, license link and modification notice remain attached. The fossil evidence is only Spalacopus sp.; the modern recording is not from Tagua Tagua."
  }
}