CAF to AU Audio conversion is the process of transforming Apple Core Audio Format (CAF) files into Sun/Next AU-format audio files so they can be used with systems and software that require AU. This conversion typically preserves sample rate and channel information while rewrapping or transcoding audio data into the AU container, enabling broader compatibility with legacy Unix-based audio tools and certain audio players.
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Read guide →Drag your .CAF file from your computer or use the browse function.
Confirm .au as the selected destination format.
Click "Convert" and download your converted .AU file once ready.
CAF files typically use the 'audio/x-caf' MIME type and support codecs like AAC, ALAC, and PCM. AU files use the 'audio/basic' MIME type and generally contain PCM or μ-law encoded data. CAF is ideal for high-quality recordings and multi-channel audio, whereas AU is favored for simple, uncompressed audio playback and scripting environments.
The AU Audio (.AU) format is commonly used for audio. Understanding its characteristics can be helpful when converting to or from other formats like CAF.
While specific technical details aren't available here, AU Audio files generally serve the purpose of storing audio effectively within their domain.
Easily convert your CAF files to AU audio format with our fast and user-friendly online converter. Whether you need the AU format for compatibility or editing purposes, our tool provides a seamless conversion experience without software installation.
CAF is a flexible and modern audio container format developed by Apple, supporting multiple codecs and metadata. In contrast, AU is a simpler, older audio file format primarily used in Unix systems with limited codec support. While CAF offers advanced features, AU provides broad compatibility for legacy applications.
Keep individual CAF files under 250MB for fast browser-based conversion; larger files may be slower or require a desktop tool.
To preserve quality, avoid unnecessary sample-rate or bit-depth changes; convert using the original sample rate and bit depth when AU supports them.
For batch conversion, use a dedicated desktop app or command-line tool (e.g., sox or ffmpeg) to automate multiple CAF-to-AU jobs and preserve metadata consistently.
Note format limitation: AU traditionally favors uncompressed PCM; compressed payloads inside CAF (like AAC or ALAC) must be decoded before AU export, which increases output size.
This CAF to AU converter saved me time and maintained perfect audio quality.
Michael R.
Audio Engineer
Quick and easy conversion without any software hassle.
Emma L.
Podcaster
Reliable tool that works directly in the browser, super convenient.
James K.
Developer
Start your free CAF to AU conversion now.
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Up to 250MB
If you need perfect channel mapping for multichannel CAF files, verify the converter supports channel layout export to AU, as some tools may downmix automatically.