There are 2 other file types using
the AT3 file extension!

at3 file icon.at3 - Airport Tycoon 3 saved game

at3 file icon.at3 - Sony ATRAC3 audio file

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AT3 file extension - Playstation audio file

What is at3 file? How to open at3 files?

File type specification:

Audio and sound file type icon Audio and sound file type

at3 file icon: at3 filetype icon

PSP® (PlayStation®Portable) system is a handheld game console. AT3 file is played by the PSP device only.

Help how to open AT3 files:

Currently there is no specific information available, about how to open this sound file type.

For general information try to look at:
Basic info how to open audio files

How to convert file with extension AT3:

Currently there is no specific information available, about how to convert this sound file type.

For general information try to look at:
Basic info how to convert audio files

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