AU Audio to W64 conversion is the process of transforming audio files in the Sun/NeXT AU format into Sony's W64 multichannel, high-resolution Wave64 format. This conversion preserves uncompressed or high-bitrate PCM audio while enabling larger file sizes and better multichannel support for professional audio workflows.
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Read guide →Drag your .AU file from your computer or use the browse function.
Confirm .w64 as the selected destination format.
Click "Convert" and download your converted .W64 file once ready.
AU Audio files usually have the MIME type audio/basic and use simple PCM or μ-law codecs. W64 files use audio/w64 MIME type and support 64-bit floating-point PCM encoding, ideal for high-definition audio recording and editing. W64 is commonly employed in digital audio workstations and mastering environments.
The W64 (.W64) format is commonly used for audio. Understanding its characteristics can be helpful when converting to or from other formats like AU Audio.
While specific technical details aren't available here, W64 files generally serve the purpose of storing audio effectively within their domain.
Our Online AU to W64 Converter allows you to seamlessly convert your AU Audio files to the high-quality W64 format. Whether you need better audio fidelity or compatibility, our tool provides a fast and user-friendly solution without the need to install any software.
AU Audio is an older audio file format primarily used on Unix systems, typically with 8-bit or 16-bit samples. W64 is a high-resolution audio format supporting 64-bit float samples, designed for professional audio applications. While AU files are simpler and less precise, W64 offers superior fidelity and editing flexibility.
Keep individual AU files under 250 MB for free web conversions to avoid timeouts; for local tools you can convert much larger files, often limited only by disk space.
To preserve quality, convert AU files with PCM data to W64 using the same sample rate and bit depth rather than resampling or dithering.
For batch conversion, process files in groups of 10–50 depending on your machine’s RAM and CPU; use a command-line utility or DAW for reliable bulk processing.
Note format limitations: AU often uses legacy μ-law/a-law encodings—these are lossy; convert to PCM W64 for best downstream compatibility but expect inherent quality limits if source is compressed.
Love how simple and fast the conversion process is!
Sarah T.
Designer
The quality of W64 output exceeded my expectations.
Mark D.
Audio Engineer
Perfect tool for converting old AU files to modern formats.
Emily R.
Podcaster
Start your free AU to W64 conversion now.
Drag your file here to to upload.
Up to 250MB
If you need multichannel output, ensure your AU contains channel metadata or perform channel mapping during conversion to avoid misplaced channels.