Convert AU to M4B in 3 steps

Convert AU to M4B easily within a few seconds using this free and online tool. Our converter has no file size limitations, and conversions are keeping all data from the original audio file. Choose your documents and convert any audio from AU to M4B.

How to convert AU to M4B in 3 steps

Our goal was to create a simple but efficient AU to M4B online converter. That's why we decided to make it so easy to use. All it takes to convert every file is a three-step process.

Upload AU file

STEP 1

Upload your AU file in the upload box using a 'drag and drop' method or add a link of a document you want to convert.

Converting AU to M4B

STEP 2

After uploading an audio file, press the 'Start conversion' button and wait a few moments for conversion to be finished.

Download converted M4B file

STEP 3

The only thing left for you to do is to download all converted M4B audio files to your computer.

AU Converter

What is a AU file?

This type of file represents a simple audio file that was primarily common on NeXT systems and early Web pages. The AU file format was, at first, used by Sun or some similar Unix-based machine, but now, it can be opened with other audio programs as well. To reproduce this file format, you can use Nullsoft Winamp, Apple QuickTime Player, Microsoft Windows Media Player, RealNetworks, RealPlayer Cloud, or Adobe Audition CC. Although AU files are quite small and have poor sound quality, they store information in three sections. The first one is called header, with a maximum of 24 bytes. Next, there’s a variable-length annotation block. And last but not least, there’s the audio data itself.

M4B Converter

What is a M4B file?

To every true audio-bibliophile, this file format is a well-known thing. To others, on the other hand, some introduction to it will come in handy. As we previously mentioned, the M4B file extension is a MPEG-4 audiobook file, and it’s mostly used by iTunes to store audiobooks. The main reason why this file format is more preferred over MP3s is a so-called digital bookmark. This feature allows you to pause playback and resume audio later on. Another advantage of an M4B file is, through utilizing chapter markers, a single document can be segmented into manageable chunks for the listener to use like the chapters of a book. M4B file format is compatible with various media players like Apple iTunes, File Viewer Plus, Nullsoft Winamp, Microsoft Windows Media Player, Roxio Creator NXT Pro, Ventis Media MediaMonkey, VideoLAN VLC media player, etc.

AU to M4B conversion is not quite convenient for you? Never mind, there are plenty of formats for you to choose from.

AU TO AAC, AU TO AC3, AU TO AIF, AU TO AIFC, AU TO AIFF, AU TO AMR, AU TO CAF, AU TO FLAC, AU TO M4A, AU TO M4B, AU TO MP3, AU TO OGA, AU TO SFARK, AU TO VOC, AU TO WAV, AU TO WEBA, AU TO WMA and AU TO AU.

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