MP3 Operations

Precautions when creating MP3 in SD/ MMC card

Usable sampling rates and bit rates:

MP3

Decode Format

MPEG 1 and 2 - Layer 3

Sampling Rate (kHz)

MPEG-1

: 32, 44.1, 48

 

MPEG-2

: 16, 22.05, 24

Bit-rate (kbps)

MPEG-1 : 32 - 320

 

MPEG-2

: 8 - 160

 

VBR

 

SD/MMC Format

FAT12 or FAT16

2.The folder name and file name can be dis- played as the title during MP3 play but the

title must be within 30 single byte alphabetical letters and numerals (not including a file exten- sion). Longer name will not be displayed.

Folder structure

1.SD card with a folder having more than 8 hi- erarchical levels will be impossible. However, the following hierarchical structure is recom- mended.

English

Folder Level Limit

: 8 Level

Max. Folder Support : 255

Max. Files Support

: 255

Folder Name

: Max. 30 Characters

File Name

: Max. 30 Characters

File extensions

Always add a file extension “.MP3” to MP3 file by using single byte letters. If you add a file extension other than specified or forget to add the file extension, the file cannot be played.

Never simply change any file extension to “.MP3” as this will cause unexpected result and may damage the unit as well. Please use appropriate audio converter to change to valid mp3 files.

Logical format (File system)

1.When writing MP3 file on a SD/MMC card, please select “FAT12” or “FAT16” as the system file format. Please be aware that the Windows XP will format any volume of 512MB or larger with FAT32 by default. Thus, if the disk is using “FAT32” system file format, please format the disk with “FAT” system file format which is “FAT16”. All the data will be erased during formatting. Thus, please backup your data accordingly.

Notes:

“ ” is a number of folders that are limited to “Number of files or folders” conditions.

Please use subdirectory/subfolder as recommended and avoid placing all the audio files in the root directory.

Number of files or folders

1.Up to at least 255∗ files can be recognized per folder.

Up to at least 255∗ files can be played.

∗ Entries includes sub-folders and MP3 files.

2.Tracks are always sorted alphabetically and played in that order. (Tracks might not always be played in the order displayed on the PC.)

3.Some noise may occur depending on the type of encoder software used while recording.

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