{
  "fileFormatID": 1512,
  "formatName": "RF64 Multichannel Broadcast Wave format",
  "version": null,
  "formatDescription": "RF64 is a Broadcast Wave compatible multichannel file format enabling file sizes to exceed 4 GB. The file format is based on the Microsoft RIFF/WAVE format and Wave Format Extensible for multichannel parameters. Additions are made to the basic specification to allow for more than 4 GB file sizes when needed (the new maximum filesize is now approximately 16 exabytes).\r\n\r\nAn RF64 file containing the bext chunk becomes a Multichannel Broadcast Wave format. Further research is required to better understand this format. Users with samples are encouraged to contact the PRONOM team.",
  "releaseDate": null,
  "binaryFileFormat": null,
  "formatNote": null,
  "lastUpdatedDate": "11 Feb 2015",
  "formatProvenance": null,
  "formatSourceDate": "11 Feb 2015",
  "formatDisclosure": null,
  "formatEnvironment": null,
  "formatRisk": null,
  "formatAliases": "MBWF",
  "formatTypes": "Audio",
  "formatFamilies": "WAVE",
  "identifiers": [
    {
      "identifierText": "fmt/713",
      "identifierType": "PUID"
    }
  ],
  "internalSignatures": [
    {
      "signatureID": 1039,
      "name": "RF64 MBWF",
      "note": "BOF: RF64{4}WAVEds64 with bext chunk following at indeterminate point. Further research is required to refine this signature",
      "byteSequences": [
        {
          "positionType": "Absolute from BOF",
          "offset": 0,
          "maxOffset": 0,
          "byteSequence": "52463634{4}5741564564733634*62657874",
          "endianness": null,
          "byteSequenceID": 1280
        }
      ],
      "provenance": "https://tech.ebu.ch/docs/tech/tech3306-2009.pdf"
    }
  ],
  "externalSignatures": [
    {
      "externalSignature": "wav",
      "signatureType": "File extension"
    },
    {
      "externalSignature": "rf64",
      "signatureType": "File extension"
    }
  ],
  "relationships": [
    {
      "relationshipType": "Has priority over",
      "relatedFormatID": 1511,
      "relatedFormatName": "RF64",
      "relatedFormatPUID": "fmt/712"
    }
  ],
  "submittedBy": [
    178
  ]
}