How do I convert an MKV file to AU audio?

Upload your MKV file, select the audio track you wish to extract, set AU as the output format, and click Convert. The tool will decode the video container, pull out the audio stream, and encode it to uncompressed AU—ready for download in seconds.

Why should I convert MKV to AU instead of using the MKV file directly?

MKV is a container that often holds video and audio together, making audio access cumbersome in audio-only software. AU is a standalone audio format widely supported by older audio editors, DAWs, and embedded systems. Converting extracts just the sound, reducing it to a single, compatible file.

What audio data is preserved when converting MKV to AU?

The converter extracts the audio track's original sample rate, bit depth, and channel layout without recompression. Because AU stores PCM data, the conversion is bit-exact—no lossy artifacts are introduced. However, if the MKV contains lossy audio like AAC, the stored quality remains that of the source, not the full recording.

Is MKV-TO-AU free to use?

Yes, MKV-TO-AU on LetsConvert is 100% free with no registration or hidden fees required.

Are my uploaded files safe and secure?

Yes! File privacy and security are guaranteed. Basic conversions run locally in your browser. Files sent for server processing are automatically deleted within 1 hour.

Does this converter work on mobile phones and tablets?

Yes! MKV-TO-AU works seamlessly across iPhone, Android, iPad, Mac, Windows, and Linux browsers without installing any app.

Is there any software installation required?

No software or browser extension installation is needed. All conversions are performed directly online.

MKV➔AU· 100% Free & Full HD

MKV-TO-AU

Convert MKV video to AU audio by extracting the track and saving it as uncompressed PCM. Ideal for legacy audio editors and preserving original quality.

★★★★★

4.9 / 5.0(43 user ratings)

Rate this tool:

🎬

Choose Mkv video file or drag & drop here

Supports up to 50MB · Hardware accelerated transcode

Browse Video

Or import from:

📢

Share MKV-TO-AURecommend this free tool to your friends & colleagues

📁

MKV

Matroska Multimedia Container

Source Format

MKV is an open-standard, highly flexible multimedia container format capable of holding an unlimited number of video, audio, picture, and subtitle tracks inside a single file with chapter markers and rich menu systems.

Category: Digital Video

MIME Type: video/x-matroska

Developer: Matroska Open Standard

Best For: Movie backups, high-definition film archiving, multi-language video distribution, and anime media.

✨

AU

AU File Format

Target Output

AU is a standardized digital file format supported by LetsConvert. Convert AU files securely, privately, and instantly online with zero software installation, bank-grade encryption, and automatic 60-minute file purging.

Category: Data & Media File

MIME Type: application/au

Developer: Standard Organization

Best For: Converting and managing AU files across devices and applications.

💡 Technical Guide & Conversion Insights

Why Convert MKV to AU?

Converting from MKV (Matroska Multimedia Container) to AU (AU File Format) is essential when you need enhanced compatibility, reduced file size, or specific feature support. While MKV is ideal for Movie backups, high-definition film archiving, multi-language video distribution, and anime media., AU offers superior advantages for Converting and managing AU files across devices and applications.. Our secure online conversion engine ensures that all your MKV file attributes, geometry, quality, and metadata are seamlessly preserved during the transformation into AU.

● MKV Key Advantages:

✓Supports multiple audio language tracks and switchable soft subtitles
✓Compatible with any modern video codec (AV1, HEVC, VP9, H.264)
✓Open-source and highly resilient to corruption

● AU Key Advantages:

★Standard format compatibility
★Fast online conversion processing
★Zero software install required

MKV vs AU Comparison Table

Detailed technical differences and capabilities between Matroska Multimedia Container and AU File Format.

Feature / Attribute	MKV	AU
Primary Format Name	Matroska Multimedia Container	AU File Format
Primary File Category	Digital Video	Data & Media File
Standard MIME Type	video/x-matroska	application/au
Core Developer / Standard	Matroska Open Standard	Standard Organization
Optimal Use Case	Movie backups, high-definition film archiving, multi-language video distribution, and anime media.	Converting and managing AU files across devices and applications.

❓ Common Questions

Frequently Asked Questions (MKV to AU)

Everything you need to know about converting MKV to AU with LetsConvert.

To convert your MKV file to AU, upload your file by dragging and dropping it into the upload box or selecting it from your device. Adjust any optional quality or dimension settings, then click 'Convert'. Your converted AU file will be ready for instant high-speed download within seconds.

🛡️

100% Secure & Automatic File Purging

Your MKV files are encrypted with 256-bit SSL and permanently deleted from our servers within 60 minutes.

● Zero File Storage

How to Convert MKV-TO-AU

Select or drop your Mkv file.

Initiate the AU conversion process.

Download your converted AU file.

⚡ Related Video Tools

MKV-TO-AU

MKV

AU

Why Convert MKV to AU?

● MKV Key Advantages:

● AU Key Advantages:

MKV vs AU Comparison Table

Frequently Asked Questions (MKV to AU)

100% Secure & Automatic File Purging

How to Convert MKV-TO-AU

Related Video Converters (101)

3GP to AU

3GP to MKV

AIFF to MKV

ASF to AU

ASF to MKV

AU to 3GP

AU to ASF

AU to AVI

AU to FLV

AU to GIF

AU to M2TS

AU to MKV

AU to MOV

AU to MP4

AU to MPEG

AU to MPG

AU to MTS

AU to OGM

AU to OGV

AU to WEBM

AU to WMV

AVI to AU

AVI to MKV

AVS to MKV

Explore All VIDEO Pairs & Formats

⚡ Convert from MKV to other formats: