MATROSKA Audio to AU Audio conversion is the process of rewrapping or transcoding audio streams contained in an MKA (MATROSKA Audio) container into the AU audio file format used by Sun/NeXT systems and many legacy audio tools. This conversion extracts the audio tracks from the flexible, modern Matroska container and outputs them in the simpler AU container (or encoded AU data), preserving sample rate, bit depth, or re-encoding as needed for compatibility with legacy software and hardware.
Related guides
Practical guides to help you choose formats, preserve quality, and avoid common conversion problems.
FLAC and MP3 solve different audio problems. FLAC preserves every sample for archiving, editing, and serious listening, while MP3 creates compact files for phones, cars, streaming libraries, and quick sharing. This guide explains how FLAC to MP3 conversion works, which bitrate settings are most transparent, how to protect tags and album art, and when you should avoid converting at all.
Read guide →Learn how to convert WAV to MP3 with optimal quality settings. This guide covers bitrate selection, CBR vs VBR encoding, step-by-step conversion methods using online tools, Audacity, and FFmpeg, plus expert advice on preserving audio fidelity during compression.
Read guide →A comprehensive comparison of MP3, FLAC, AAC, WAV, and OGG audio formats. Learn which codec delivers the best quality, compatibility, and file size for music, podcasts, and archiving.
Read guide →Drag your .MKA 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.
MKA files use the MIME type audio/x-matroska and typically contain audio streams encoded in codecs like AAC, Vorbis, or FLAC. AU files have the MIME type audio/basic and are commonly used in UNIX systems for audio playback, supporting codecs such as PCM and μ-law. Both formats serve distinct purposes depending on the use case, with MKA favored for multi-track content and AU for simple audio storage.
The AU Audio (.AU) format is commonly used for audio. Understanding its characteristics can be helpful when converting to or from other formats like MATROSKA Audio.
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 MATROSKA Audio (MKA) files to the AU Audio format using our free, user-friendly online converter. No software installation required, making your audio file conversion seamless and efficient.
MATROSKA Audio (MKA) is a versatile container format that supports multiple audio tracks and metadata, making it suitable for complex multimedia setups. In contrast, the AU Audio format is simpler and more widely supported by traditional audio tools, focusing on straightforward audio playback and editing. While MKA excels in flexibility, AU offers ease of use and compatibility.
Keep individual files under 250 MB for free web-based converters to ensure fast uploads; larger files may be slower or require a desktop tool.
To preserve audio fidelity, prefer lossless passthrough: if the MKA contains PCM or FLAC, export to PCM AU rather than re-encoding to a lossy format.
For large collections, use batch conversion with consistent sample-rate and bit-depth presets to avoid resampling artifacts and simplify metadata handling.
Be aware AU is an older container with limited metadata support compared to MATROSKA; expect some tags, chapters, or attachments to be lost when converting.
This MKA to AU converter made my workflow so much smoother!
Emily R.
Audio Engineer
Fast, reliable, and easy to use—highly recommend for quick audio conversions.
James K.
Music Producer
Great tool for converting my episodes to a more compatible format without hassle.
Sophia L.
Podcaster
Start your free MKA to AU conversion now.
Drag your file here to to upload.
Up to 250MB
If the MKA contains compressed codecs not supported by your target, transcode to compatible PCM in AU and check levels to prevent clipping.