The Broadcast WAV Extension metadata available in some WAV files can be viewed as text in the Snapshot Editor, from a View menu or by double clicking on an audio properties table. If you wish to manually parse the data, you can extract it via the BEXT Metadata property. When the property is extracted it is formated as a key-value list using the standard delimiters. The following keys may be available:
Version 0
- Description
- A description field. The field may be divided into a brief and detailed description. If this is located the data is displayed as brief / detailed.
- Originator
- The producer of the audio file.
- Originator Reference
- An unambiguous reference allocated by the originating organisation.
- Origination Date
- The creation date formatted as YYYY-MM-DD. Note that alternate delimiters may be used to separate the date components.
- Origination Time
- The creation time formatted as HH:MM:SS. Note that alternate delimiters may be used to separate the time components.
- Time Reference
- The time-code of the sequence.
- Delay
- Delay is calculated by Yate from the Time Reference item and a file's sample rate.
- Version
- The version number of the metadata block.
Version 1 (includes Version 0 keys)
- UMID
- A unique material identifier which may be up to 64 bytes in length. For display purposes if no non zero data follows a 00 byte, a ... sequence is appended to represent the remaining 00 values in the potential 64 byte sequence.
Version 2 (includes Version 0 and 1 keys)
- Loudness Value
- The loudness value of the file in LUFS.
- Loudness Range
- The loudness value of the file in LU
- Max True Peak Level
- The Maximum True Peak Value of the file in dBTP.
- Max Momentary Loudness
- The highest value of the Momentary Loudness Level of the file in LUFS.
- Max Short Term Loudness
- The highest value of the Short-term Loudness Level of the file in LUFS.
The full definition of the bext chunk can be found in Specification of the Broadcast Wave Format (BWF).
