Guidelines: Embedding Metadata in Broadcast WAVE Files - BWF MetaEdit Help:
Technical Metadata

Back to help home

The Technical Metadata view displays information about each file (in either a CSV document or a table) including the file size, metadata from the <fmt > chunk, the existence of key metadata chunks, and file warnings.

Value Name	Description
FileName	In order to provide a concise presentation the filepaths are displayed from the directory path where the files diverge. Thus if two files are opened from /HardDrive1/audiofiles/music/audiofile.wav and /HardDrive1/audiofiles/spokenword/audiofileB.wav then these will be displayed in the table view as /music/audiofile.wav and /spokenword/audiofileB.wav since the /HardDrive1/audiofiles section of the Filepath is common to the open files. The CSV version of the Technical Metadata view displays the full filepath to each file.
FileSize	The size of the audio file in bytes.
Format	This value represents the type of compression utilized within the audio data. Below is a sample of compression codes: 0000 Unknown 0001 PCM / Uncompressed 0002 Microsoft ADPCM 0006 ITU G.711 a-law 0007 ITU G.711 Aµ-law 0011 IMA ADPCM 0016 ITU G.723 ADPCM (Yamaha) 0031 GSM 6.10 0040 ITU G.721 ADPCM 0050 MPEG FFFF Experimental
Channels	The number of audio signals that are encoded in the audio data. A value of '1' indicates mono audio, '2' for stereo, etc.
SampleRate	The number of audio samples per second.
BitRate	The number of bits utilized per second of audio.
BitsPerSample	The number of bits utilized to produce one sample of audio.
Duration	The total playing time for the audio data, displayed in HH:MM:SS.mmm (hours, minutes, seconds, milliseconds)
Bext	This column notes the existence of the <bext> chunk by either stating 'No', 'Version 0' or 'Version 1' (indicated of the version of bext chunk utilized).
INFO	Notes the existence of the INFO chunk, either 'Yes' or 'No'.
XMP	Notes the existence of the XMP chunk, either 'Yes' or 'No'. Right-click on this cell provides options to Import, Export, or Remove xml data. Doubling-clicking on the cell brings a text editor. Changes are not made until the file is saved.
aXML	Notes the existence of the aXML chunk, either 'Yes' or 'No'. Right-click on this cell provides options to Import, Export, or Remove xml data. Doubling-clicking on the cell brings a text editor. Changes are not made until the file is saved.
iXML	Notes the existence of the iXML chunk, either 'Yes' or 'No'. Right-click on this cell provides options to Import, Export, or Remove xml data. Doubling-clicking on the cell brings a text editor. Changes are not made until the file is saved.
MD5	If an MD5 chunk exists, this column will show the stored value. This MD5 value is a checksum of the audio data only (starting after the <data> chunk identifier and size) and does not include the file's metadata or any other chunk.
MD5 evaluated	If the MD5 is evaluated it will appear in this column. Any conflict between this column and the 'MD5' column indicates a change in the audio data portion of the file between the current evaluation and the stored evaluation.
Errors	Provides statements about potential structural problems with a given audio files: for instance if the RIFF size statement conflicts with the actual file size or if the audio files does not utilize padding bytes to follow odd byte length chunks.
Information	Used for status notes and technical information during operation.

Back to Top

Working Groups

Still Image Working Group
This group is involved in a cooperative effort to develop common digitization guidelines for still image materials.

Audio-Visual Working Group
This group works collaboratively on common and sustainable technical guidelines, methods, and practices for digitized and born digital sound recordings and moving images.