Core Audio Format 1.0

Writable

audio

Apple’s Core Audio Format is a file format for storing and manipulating digital audio data. It is fully supported by Core Audio APIs on Mac OS X v10.4 and later and on Mac OS X v10.3 with QuickTime 7 or later. CAF provides high performance and flexibility, and is scalable to future ultra-high resolution audio recording, editing, and playback. CAF files have several advantages over other standard audio file formats: • Unrestricted File Size • Safe and Efficient Recording • Support For Many Data Formats • Support For Many Types of Auxiliary Data • Support of Data Dependencies

Identify it

Extensions	`.caf`
MIME types	`audio/x-caf`
Signatures	`636166660001000064657363` at byte 0 (Apple Core Audio Format 1) `63616666` at byte 0
PRONOM	`fmt/416`
Wikidata	`Q2997216`
Library of Congress	`fdd000591`

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libsndfileOpen sourcereads and writes · GNU Lesser General Public License
PhotoRecOpen sourcereads · GNU General Public License
Q141674392Open sourcereads · Apache Software License 2.0 / MIT License
Awave Studioreads and writes
EZ CD Audio Converterreads
Final Cut Pro Xreads · proprietary license
GarageBandreads
Soundtrack Proreads

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Sources

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

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