RF64

RF64
Internet media type	audio/vnd.wave
Developed by	European Broadcasting Union
Latest release	2.0; June 2018; 6 years ago
Type of format	Audio file format
Extended from	WAV, BWF
Standard	RF64: An Extended File Format for Audio; ITU-R BS.2088: Long-form file format for the international exchange of audio programme materials with metadata;

RF64 is a BWF-compatible multichannel audio file format enabling file sizes to exceed 4 GiB. It has been specified by the European Broadcasting Union. It has been accepted as the ITU recommendation ITU-R BS.2088.

The file format is designed to meet the requirements for multichannel sound in broadcasting and audio archiving. It is based on the Microsoft RIFF/WAVE format and Wave Format Extensible for multichannel parameters. Additions are made to the basic specification to allow for more than 4 GB file sizes when needed (the new maximum filesize is now approximately 16 exabytes). The format is transparent to the BWF and all its supplements and chunks. RF64 WAV files typically use the .wav file extension.