As far as we know, Sony ATRAC3 audio files (.at3) can be exported to FLAC format (.flac) using Sound Forge program. Unfortunately, we do not know about any other program capable of at3 to flac conversion, so using the original program is most likely your only option.
Home > Search converters: at3 to flac
Conversion of at3 file format to flac file format beta
Search for at3 to flac converter or software able to handle these file types.
Convert Sony ATRAC3 audio to Audio files encoded by Flac - free lossless audio codec.
We have found one software suitable in our database for this conversion.
Microsoft Windows software 
- convert at3 to flac on Windows
Sound Forge
A digital audio editing software from Sony
File extension | Convert | Open | Save | Edit | Create | Import | Export | Extract |
|---|---|---|---|---|---|---|---|---|
Convert from at3 file | No | Yes | Yes | at3 editor | Yes | No | No | No |
to flac file | No | Yes | Yes | flac editor | No | Yes | Yes | No |
The table with program actions contains information about what each program is capable of doing with their files. This may be a good pointer for further searches for certain file conversions and help you find the converter you are looking for if our search result is insufficient for you. However, it is far from perfect and may sometimes show results which are not really usable because of the nature of the software handles the files. So a conversion that appears as possible, just because of matched actions, may in fact not be possible.
Additional links: Open at3 file, Open flac file
AT3
Files with at3 file extension was also sometimes used for Sony ATRAC audio format. No longer actively used.
FLAC
A flac file extension is used for audio files compressed with the FLAC, aka Free Lossless Audio Codec. FLAC files do not lose any quality with their compression as MP3 do, but they are generally larger. Most modern media players support playback of FLAC files.
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