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.
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.
STEP 2
After uploading an audio file, press the 'Start conversion' button and wait a few moments for conversion to be finished.
STEP 3
The only thing left for you to do is to download all converted AMR audio files to your computer.
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.
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.
If the AMR is your starting one, you can choose one of the following conversions.
AMR TO AAC, AMR TO AC3, AMR TO AIF, AMR TO AIFC, AMR TO AIFF, AMR TO AU, AMR TO CAF, AMR TO FLAC, AMR TO M4A, AMR TO M4B, AMR TO MP3, AMR TO OGA, AMR TO SFARK, AMR TO VOC, AMR TO WAV, AMR TO WEBA, AMR TO WMA, AMR TO AMR and AMR TO FLP.