Convert AU to AMR in 3 steps

Convert AU to AMR 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 AMR.

How to convert AU to AMR in 3 steps

Our goal was to create a simple but efficient AU to AMR 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 AMR

STEP 2

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

Download converted AMR file

STEP 3

The only thing left for you to do is to download all converted AMR 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.

AMR Converter

What is a AMR file?

Ericsson developed this file extension and named it AMR. It stands for the Adaptive Multi-Rate ACELP Codec file. In case you are wondering, we are talking about a human speech audio compression algorithm or Algebraic Code Excited Linear Prediction (ACELP). It means that AMR file format used for encoding speech-based audio files, voice recording, and VoIP applications. You can save every AMR file in two different extensions, AMR-NB (Narrowband) and AMR-WB (Wideband). The only difference between these two is that a Wideband provides better sound quality. You can easily open AMR files using File Viewer Plus, Apple QuickTime Player, ArcSoft TotalMedia Theatre, VideoLAN VLC Media Player, Audacity, RealPlayer Cloud, etc.

AU to AMR 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, AU TO AU and AU TO FLP.

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