A Audio File and Compression Formats

A.1 Supported AIFF Data Formats

The supported AIFF format ID, file format, file extension, MIME type, audio features, compression format, and encoding/compression type are the following:

• Format ID: AIFF

• File Format: AIFF

• File extension: .aff

• MIME type: audio/x-aiff

• Audio features:

  • Single channel

  • Stereo

  • 8-bit samples

  • 16-bit samples

  • Linear PCM encoding

• Compression format: Standard AIFF Uncompressed

• Encoding/Compression Type: TWOS

A.2 Supported AIFF-C Data Formats

The supported AIFF-C format ID, file format, file extension, MIME type, and audio features are the following:

• Format ID: AIFC

• File format: AIFC

• File extension: .aft

• MIME type: audio/x-aiff

• Audio features:

• • Single channel

  • Stereo

  • 8-bit samples

  • 16-bit samples

Table A-1 lists the supported AIFF-C data compression format names and encoding/compression types.

A.3 Supported AU Data Formats

The supported AU format ID, file format, file extension, MIME type, and audio features are the following:

• Format ID: AUFF

• File format: AUFF

• File extension: .au

• MIME type: audio/basic

• Audio features:

  • Single channel

  • Stereo

  • 8-bit samples

  • 16-bit samples

  • mu-law encoding

  • Linear PCM encoding

Table A-2 lists the supported AU data compression format names and encoding/compression types.

A.4 Supported 3GP Data Format

The supported 3GP format ID, file format, file extension, and MIME type are the following:

• Format ID: 3GP

• File Format: 3GP

• File extension: .3gp

• MIME type: audio/3gpp

A.5 Supported Audio MPEG Data Formats

The supported audio MPEG formats are MPEG1, MPEG2, and MPEG4, as described in the following sections.

A.6 Supported RealNetworks Real Audio Data Format

The supported RealNetworks Real Audio format ID, file format, file extensions, MIME type, and audio features are the following:

• Format ID: RMFF

• File format: RMFF

• File extensions: .ra, .rm, and .ram

• MIME type: audio/x-pn-realaudio

• Audio features: one or more streams with different bit rates

A.7 Supported WAV Data Formats

The supported WAV format ID, file format, file extension, MIME type, and audio features are the following:

• Format ID: WAVE

• File format: WAVE

• File extension: .wav

• MIME type: audio/x-wav

• Audio features:

  • Single channel

  • Stereo

  • 8-bit samples

  • 16-bit samples

  • Linear PCM encoding

Table A-4 lists the supported WAV data compression format names and encoding/compression types.