About MP3 files

MP3 (MPEG 1 Audio Layer-3) is a standard technology and format for compressing a sound sequence. The file is compressed to about 1/10 of its original size. Sounds outside the range of human hearing are compressed while the sounds we can hear are not compressed.

Recommended MP3 file format

Sampling frequency

32k, 44.1k, 48k

(Hz)

 

 

 

Bitrate (bps)

128k

 

 

Notes on discs

You can play MP3 files recorded on CD-ROMs, CD-Rs, and CD-RWs.

The disc must be in the ISO 9660* level 1 or level 2 format, or Joliet in the expansion format.

*ISO 9660 Format

The most common international standard for the logical format of files and folders on a CD-ROM.

There are several specification levels. In Level 1, file names must be in the 8.3 format (no more than 8 characters in the name, no more than 3 characters in the extension “.MP3”) and in capital letters. Folder names can be no longer than 8 characters. There can be no more than 8 nested folder levels. Level 2 specifications allow file names up to 31 characters long.

Each folder can have up to 8 trees.

For Joliet in the expansion format, make sure of the contents of the writing software, etc.

Notes

•With formats other than ISO 9660 level 1 and level 2, folder names or file names may not be displayed correctly.

•When naming, be sure to add the file extension “.MP3” to the file name.

•If you put the extension “.MP3” to a file other than MP3, the player cannot recognize the file properly and will generate random noise that could damage your speakers.

•The following discs take a longer time to start playback.

—a disc recorded with complicated tree structure.

—a disc to which data can be added.

•A high-bit rate MP3 file such as 320 kbps may not play back properly.

The playback order of the MP3 files

The playback order of the folders and files is as follows:

 

 

 

 

Folder

 

 

 

 

(album)

 

 

 

 

MP3 file

 

 

 

 

9

 

 

 

 

(track)

 

 

 

 

3

2

1

4

7

8

6

5

Tree 1

Tree 2

Tree 3

Tree 4 Tree 5

(root)

 

 

 

Tip

To specify a desired playback order, before the folder or file name, input the order by number (e.g., “01,” “02”), then record contents onto a disc (The order differs depending on the writing software).

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