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  "fileFormatID": 1102,
  "formatName": "Adaptive Multi-Rate Audio",
  "version": null,
  "formatDescription": "The Adaptive Multi-Rate (AMR or AMR-NB or GSM-AMR) audio codec is an audio compression format optimized for speech coding. AMR speech codec consists of a multi-rate narrowband speech codec that encodes narrowband (200\u20133400 Hz) signals at variable bit rates ranging from 4.75 to 12.2 kbit/s with toll quality speech starting at 7.4 kbit/s.",
  "releaseDate": null,
  "binaryFileFormat": "Text",
  "formatNote": null,
  "lastUpdatedDate": "17 Jun 2011",
  "formatProvenance": null,
  "formatSourceDate": "17 Jun 2011",
  "formatDisclosure": null,
  "formatEnvironment": null,
  "formatRisk": null,
  "formatAliases": "AMR-NB, GSM-AMR",
  "formatTypes": "Audio",
  "formatFamilies": null,
  "identifiers": [
    {
      "identifierText": "audio/amr",
      "identifierType": "MIME"
    },
    {
      "identifierText": "fmt/356",
      "identifierType": "PUID"
    }
  ],
  "internalSignatures": [
    {
      "signatureID": 524,
      "name": "Adaptive Multi-Rate Audio",
      "note": "Header (ASCII): #!AMR.",
      "byteSequences": [
        {
          "positionType": "Absolute from BOF",
          "offset": 0,
          "maxOffset": null,
          "byteSequence": "2321414D520A",
          "endianness": null,
          "byteSequenceID": 646
        }
      ],
      "provenance": "Ongoing DROID research"
    }
  ],
  "externalSignatures": [
    {
      "externalSignature": "amr",
      "signatureType": "File extension"
    }
  ],
  "relationships": [
    {
      "relationshipType": "Can be contained by",
      "relatedFormatID": 1103,
      "relatedFormatName": "3GPP Audio/Video File",
      "relatedFormatPUID": "fmt/357"
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  ],
  "submittedBy": [
    1
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}