Convert AU to GSM
Fast, free AU to GSM conversion — works in any browser
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au
AU format for reliable data storage
| File extension | .au .snd |
|---|---|
| File category | audio |
| Programs | VLC media player Audacity MPlayer Xine Sox |
| Tech description | https://en.wikipedia.org/wiki/Au_file_format |
| MIME type | audio/basic audio/au |
| Developer | Sun Microsystems |
This audio format was developed by Sun Microsystems. It is intended for storing audio files; the file itself consists of three components: the header, the annotation unit, and the audio file itself. What distinguishes this format is the small file size, due to which its sound quality is low. It can be converted into other formats, such as mp3 or MPEG. Although this format is mostly used on personal computers that are powered by operating systems Sun or Unix, AU files can also be opened using other audio players.
gsm
GSM digital audio format
| File extension | .gsm |
|---|---|
| File category | audio |
| Programs | VLC media player Audacity Sox MPlayer |
| Tech description | https://en.wikipedia.org/wiki/Full_Rate |
| MIME type | audio/x-gsm |
| Developer | European Telecommunications Standards Institute (ETSI) |
Developed in Europe, this format was designed for mobile users. GSM is used for audio files that contain a large amount of audio information. Suitable for voice recordings, including recordings of phone calls. You can compress and archive a GSM file to achieve a different file size. The format is mostly used to create and store voice information. There are 4 types of this format that can be opened using different applications.
FAQ
How to convert GSM to AU?
Upload your GSM file, select AU as the output format, and click Convert. The converted file will be ready to download in seconds — no account or installation required.
How long does it take to convert GSM to AU?
Most GSM files convert in seconds. Larger files may take up to a few minutes depending on size and internet speed. You can track the progress bar in real time during conversion.
Is it safe to convert GSM files online?
Yes. All uploaded GSM files and converted AU results are automatically deleted from our servers within 1 hour after conversion. We do not store, share, or access your files.
Can I convert GSM on iPhone or Android?
Yes, our converter works on all devices and operating systems — iPhone, iPad, Android, Windows, and macOS. Open the site in your mobile browser, upload the GSM file and convert to AU without installing any app.
