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MP3 files
MP3, which stands for MPEG-1 Audio Layer3, a standard for audio files compression supported
by the Motion Picture Experts Group, an ISO (International Organization for Standardization)
working group, enables compression of audio files to about 1/10 of the data size of a standard
compact disc. Since the MP3 encoding algorithm is public, there are various encoders/decoders
that are compliant with this standard, including freeware that is available for no charge. Thus, the
MP3 standard is widely used in the computer field.
The major specifications of the acceptable disc format are:
• Maximum directory levels: 8
• Acceptable characters for a file/folder name:
A - Z, a - z, 0 - 9, _ (underscore)
Notes
• When naming files, be sure to add the file extension “.mp3” to the file name.
• If you add the extension “.mp3” to a file other than an MP3 file, the player will not be able to recognize the
file properly.
•The file name does not correspond to the ID3 tag.
The usable number of groups and files
• Maximum number of groups: 100
• Maximum number of files: 400
Settings for compression and writing software
•This CD player supports MP3 files with the following specifications: transfer bit rate:
16 - 320 kbps and sampling frequencies: 32/44.1/ 48 kHz. Variable Bit Rate (VBR) is also
supported.
To compress a source for an MP3 file, we recommend setting the transfer bit rate of the
compression software to “44.1 kHz,” “128 kbps,” and “Constant Bit Rate.”
•To record up to the maximum capacity, set to “halting of writing.”
•To record at one time up to the maximum capacity on media that has nothing recorded on it,
set to “Disc at Once.”
Notes on saving files on the media
• Do not save files in other formats or unnecessary folders on a disc that has MP3 files.
•When a disc is inserted, the CD player reads all the information of folders and files on that
disc. If there are many folders on the disc, it may take a long time for play to begin or for the
next file to start playback.
Enjoy your ATRAC Portable CD Player!