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<PRONOM-Report xmlns="http://pronom.nationalarchives.gov.uk">
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      <FormatID>692</FormatID>
      <FormatName>Windows Media Audio</FormatName>
      <FormatVersion>
      </FormatVersion>
      <FormatAliases>WMA</FormatAliases>
      <FormatFamilies>
      </FormatFamilies>
      <FormatTypes>Audio</FormatTypes>
      <FormatDisclosure>Full</FormatDisclosure>
      <FormatDescription>Windows Media Audio Format is a subtype of the Advanced Systems Format, developed by Microsoft for storing audio data streams. It comprises a Header Object, which describes the properties of the data streams, a Data Object, which contains the actual data streams stored in Data Packets and, optionally, one or more Index Objects. Audio data is stored using the Windows Media Audio codec, and the format supports streaming across networks.</FormatDescription>
      <BinaryFileFormat>Binary</BinaryFileFormat>
      <ByteOrders>Little-endian (Intel)</ByteOrders>
      <ReleaseDate>01 Dec 2004</ReleaseDate>
      <WithdrawnDate>
      </WithdrawnDate>
      <ProvenanceSourceID>1</ProvenanceSourceID>
      <ProvenanceName>Digital Preservation Department / The National Archives</ProvenanceName>
      <ProvenanceSourceDate>11 Mar 2005</ProvenanceSourceDate>
      <ProvenanceDescription>
      </ProvenanceDescription>
      <LastUpdatedDate>02 Aug 2005</LastUpdatedDate>
      <FormatNote>
      </FormatNote>
      <FormatRisk>
      </FormatRisk>
      <TechnicalEnvironment>
      </TechnicalEnvironment>
      <FileFormatIdentifier>
        <Identifier>audio/x-ms-wma</Identifier>
        <IdentifierType>MIME</IdentifierType>
      </FileFormatIdentifier>
      <FileFormatIdentifier>
        <Identifier>com.microsoft.windows-media-wma</Identifier>
        <IdentifierType>Apple Uniform Type Identifier</IdentifierType>
      </FileFormatIdentifier>
      <FileFormatIdentifier>
        <Identifier>fmt/132</Identifier>
        <IdentifierType>PUID</IdentifierType>
      </FileFormatIdentifier>
      <Document>
        <DocumentID>3</DocumentID>
        <DisplayText>Microsoft Corporation, 2004, Advanced Systems Format (ASF) Specification: Revision 01.20.03</DisplayText>
        <DocumentType>Authoritative</DocumentType>
        <AvailabilityDescription>Public</AvailabilityDescription>
        <AvailabilityNote>
        </AvailabilityNote>
        <PublicationDate>01 Dec 2004</PublicationDate>
        <TitleText>Advanced Systems Format (ASF) Specification: Revision 01.20.03</TitleText>
        <DocumentIPR>
        </DocumentIPR>
        <DocumentNote>
        </DocumentNote>
        <DocumentIdentifier>
          <Identifier>www.microsoft.com/windows/windowsmedia/format/asfspec.aspx</Identifier>
          <IdentifierType>URL</IdentifierType>
        </DocumentIdentifier>
        <Author>
          <AuthorID>93</AuthorID>
          <AuthorName>
          </AuthorName>
          <OrganisationName>Microsoft Corporation</OrganisationName>
          <AuthorCompoundName>Microsoft Corporation</AuthorCompoundName>
        </Author>
        <Publisher>
          <PublisherID>93</PublisherID>
          <PublisherName>
          </PublisherName>
          <OrganisationName>Microsoft Corporation</OrganisationName>
          <PublisherCompoundName>Microsoft Corporation</PublisherCompoundName>
        </Publisher>
      </Document>
      <ExternalSignature>
        <ExternalSignatureID>613</ExternalSignatureID>
        <Signature>wma</Signature>
        <SignatureType>File extension</SignatureType>
      </ExternalSignature>
      <ExternalSignature>
        <ExternalSignatureID>731</ExternalSignatureID>
        <Signature>asf</Signature>
        <SignatureType>File extension</SignatureType>
      </ExternalSignature>
      <InternalSignature>
        <SignatureID>81</SignatureID>
        <SignatureName>Windows Media Audio</SignatureName>
        <SignatureNote>Header Object + Stream Properties Object (stream type = Audio Stream) with WMA Codec ID</SignatureNote>
        <ByteSequence>
          <ByteSequenceID>148</ByteSequenceID>
          <PositionType>Absolute from BOF</PositionType>
          <Offset>0</Offset>
          <MaxOffset>
          </MaxOffset>
          <IndirectOffsetLocation>
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          <IndirectOffsetLength>
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          <Endianness>
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        <ByteSequence>
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          <PositionType>Variable</PositionType>
          <Offset>
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          <MaxOffset>
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        </ByteSequence>
      </InternalSignature>
      <RelatedFormat>
        <RelationshipType>Has lower priority than</RelationshipType>
        <RelatedFormatID>693</RelatedFormatID>
        <RelatedFormatName>Windows Media Video</RelatedFormatName>
        <RelatedFormatVersion>
        </RelatedFormatVersion>
      </RelatedFormat>
      <RelatedFormat>
        <RelationshipType>Has lower priority than</RelationshipType>
        <RelatedFormatID>1228</RelatedFormatID>
        <RelatedFormatName>Windows Media Video (WVC1)</RelatedFormatName>
        <RelatedFormatVersion>9 Advanced Profile (WVC1)</RelatedFormatVersion>
      </RelatedFormat>
      <RelatedFormat>
        <RelationshipType>Has priority over</RelationshipType>
        <RelatedFormatID>691</RelatedFormatID>
        <RelatedFormatName>Advanced Systems Format</RelatedFormatName>
        <RelatedFormatVersion>
        </RelatedFormatVersion>
      </RelatedFormat>
      <RelatedFormat>
        <RelationshipType>Is subtype of</RelationshipType>
        <RelatedFormatID>691</RelatedFormatID>
        <RelatedFormatName>Advanced Systems Format</RelatedFormatName>
        <RelatedFormatVersion>
        </RelatedFormatVersion>
      </RelatedFormat>
    </FileFormat>
    <SearchCriteria>Criteria</SearchCriteria>
  </report_format_detail>
</PRONOM-Report>
