Atrac is an audio format used by older Sony stereo systems and portable music players. This format has been largely forgotten, but if you have a Sony Atrac device, you'll need to convert MP3 files to the Atrac format before you can upload them to your music device.
Step 1
Download and install an audio converter program such as one found at AllConverterTools.com or MP3-CD-Converter.com. These three sites all feature audio converter programs that function similarly, and they convert MP3 files to the Atrac format.
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Step 2
Launch the audio converter program onto your computer and click the "Add File" button on the program screen. Select the MP3 audio files you want to convert.
Step 3
Repeat the file selection process until you have selected all the audio files you want to convert.
Step 4
Select "Atrac3" from the format option pull-down menu at the side of the screen, then choose where you'd like the converted files saved to.
Step 5
Click "Convert" to change the MP3 audio files to the Sony Atrac format.
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