RA to AU Audio conversion is the process of converting RealAudio (.ra) files—an older streaming audio format developed by RealNetworks—into Sun/NeXT .au audio files. This conversion repackages or transcodes the audio data so it can be played back by applications and devices that support the AU format, potentially changing codec, sample rate, or container without altering the audible content when lossless methods are used.
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Read guide →Drag your .RA 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.
RA files typically use the MIME type audio/vnd.rn-realaudio and are encoded with RealAudio codecs designed for streaming. AU files use the MIME type audio/basic or audio/au, often encoded with PCM or µ-law codecs. RA is mostly utilized for internet streaming, while AU is used in sound editing and archival applications.
The AU Audio (.AU) format is commonly used for audio. Understanding its characteristics can be helpful when converting to or from other formats like RA.
While specific technical details aren't available here, AU Audio files generally serve the purpose of storing audio effectively within their domain.
Our Online RA to AU Converter allows you to convert RA audio files to AU format efficiently without installing software. Whether for compatibility or editing purposes, converting RA files to AU audio ensures better usability across various applications.
RA files are RealAudio files commonly used for streaming, often compressed with proprietary codecs, which can limit their usability. In contrast, AU Audio is an older, simpler audio format with broad support in Unix environments and many audio tools. While RA focuses on streaming efficiency, AU prioritizes compatibility and ease of use for editing.
Keep source RA files under 250 MB for fastest uploads; larger files may be slower or require a premium plan.
To preserve quality, choose PCM (uncompressed) AU output or match the original RA sample rate and bit depth to avoid extra resampling.
For many files, batch conversion saves time—queue multiple RA files and convert to AU with consistent settings, but monitor CPU and disk I/O.
Be aware RA may use proprietary codecs; some RA files require decoding to an intermediate PCM format before writing AU, which can cause minor quality differences if resampling occurs.
This RA to AU converter saved me hours of manual work.
Mark L.
Audio Engineer
Quick and simple conversion, perfect for my editing workflow.
Eva S.
Podcaster
Reliable tool with excellent output quality every time.
John D.
Developer
Start your free RA to AU conversion now.
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Up to 250MB
AU is less common for streaming—if broad device compatibility is a priority, consider converting to WAV or MP3 instead of AU.