Types of AT3 Files

Principal AT3 Type

.AT3

File ID:	.at3
Classification:	ATRAC3 Audio File

This is an audio file generated by ATRAC3 ( Sony's Adaptive Transform Acoustic Coding 3) compression algorithm. It is used for playback and storage purposes in mobile media devices like Sony mp3 and CD players, Sony Ericsson mobile devices and PSP (PlayStation Portable).

Company:	Sony
Division:	Audio Files
Key:	HKEY_CLASSES_ROOT\.at3

Software Programs That Open The ATRAC3 Audio File:

MAGIX Vegas by Magix Software GmbH

Windows

Sony SonicStage by Sony

Windows

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AT3 Troubleshooting

Frequent AT3 Opening Issues

Missing MAGIX Vegas

When you double-click your AT3 file, you may see a dialog box from your operating system stating that it "Cannot Open This File Type". Customarily, this means that MAGIX Vegas is not installed on %%os%%. You won't be able to double-click to open your AT3 because your OS doesn't know what to do with it.

Tip: When you have another program installed that you know will open your AT3, you can select it from the other programs listed (see "Show Apps").

MAGIX Vegas is Out-of-Date

Your ATRAC3 Audio File file is incompatible with MAGIX Vegas because you might have the wrong version installed. You will need to download a newer version of MAGIX Vegas if you don't have the right version. The primary cause of this problem is that your ATRAC3 Audio File file was created by a different (newer) version of MAGIX Vegas than what's installed.

Tip: If you right-click on your AT3 file, then select "Properties" (Windows) or "Get Info" (Mac), you can obtain hints about what version you need.

Regardless, most of the AT3 file opening problems relate to not having the right version of MAGIX Vegas installed.

Associated Difficulties Loading AT3 Files

You can still experience errors opening AT3 files even with the latest version of MAGIX Vegas installed on your PC. Other AT3 opening errors can be created by other system problems inside of %%os%%. Problems unrelated to software:

• Invalid AT3 file references in the Windows Registry (the "phonebook" of the Windows Operating System)
• Corruption of the AT3 file description inside the Registry
• MAGIX Vegas or another AT3 application experienced a flawed installation
• Your AT3 file is corrupted (issues with your ATRAC3 Audio File file itself)
• Malware-tainted AT3 file can't be opened
• Device drivers of the hardware associated with your AT3 file are corrupt or out-of-date
• Your PC doesn’t have enough available resources to open the ATRAC3 Audio File file