Sony D-NE309 Operating Instructions - Page 8
The structure of ATRAC3plus/ATRAC3 and MP3 files, The usable number of groups and files
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The usable number of groups and files • Maximum number of groups: 255 • Maximum number of files: 999 Settings for compression and writing software • This CD player is able to play MP3 files with the following specifications: Bit rate: 16 - 320 kbps, and sampling frequencies: 32/44.1/ 48 kHz. Variable Bit Rate (VBR) file can also be played. To compress a source for an MP3 file, we recommend setting 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 (except MP3/ATRAC3plus/ATRAC3 format files) 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. The structure of ATRAC3plus/ATRAC3 and MP3 files Groups and folders The ATRAC3plus/ATRAC3 format has a very simple structure. It consists of "files" and "groups." A "file" is equivalent to a "track" of an audio CD. A "group" is a bundle of files and is equivalent to an "album." A "group" has no directory-type structure (a new group cannot be made within an existing group). When referring to MP3 CDs, "file" is equivalent to a "track" and a "group" is equivalent to an "album." This CD player is designed to recognize an MP3 folder as a "group" so that it can play CD-Rs/RWs in the same manner as it plays ATRAC3plus/ATRAC3 files. 8