RF64

Writable

audio

RF64 is a Broadcast Wave compatible multichannel file format enabling file sizes to exceed 4 GB. The file format 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).

Identify it

Extensions	`.wav.rf64`
MIME types	`audio/vnd.wave`
Signatures	`52463634` at byte 0 (RF64) `52463634ffffffff5741564564733634` at byte 0
PRONOM	`fmt/712fmt/713`
Wikidata	`Q3928266`

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Open it

Free Lossless Audio CodecOpen sourcereads and writes · 3-clause BSD License / GNU General Public License, version 2.0 / GNU Library General Public License, version 2.0
Q141674392Open sourcereads and writes · Apache Software License 2.0 / MIT License
Q300915reads · freeware

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Versions and variants (1)

RF64 Multichannel Broadcast Wave formatUnknown

Sources

From Just Solve the File Format Problem (File Formats Wiki), PRONOM, Wikidata. Updated 2026-10-24.

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