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.
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.
Precautions when creating MP3 in SD/
MMC card
Usable sampling rates and bit rates:
Decode Format
Sampling Rate
(kHz)
Bit-rate (kbps)
MPEG 1 and 2 - Layer 3
MPEG-1 : 32, 44.1, 48
MPEG-2 : 16, 22.05, 24
MPEG-1 : 32 - 320
MPEG-2 : 8 - 160
VBR
MP3
SD/MMC
Format
FAT12 or FAT16
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.
Folder Level limit : 8 Level
Max. Folder Support : 255
Max. Files Support : 255
Folder Name : Max. 30 Characters
File Name : Max. 30 Characters
Never insert foreign objects into the SD/
MMC memory card slot as it may cause the
unit to break down.
CAUTION
!
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.
Notes:
“ ” is a number of folders that are limited to
“Number of files or folders” conditions.
Please use subdirectory/subfolder as recom
-
mended and avoid placing all the audio files in the
root directory.
MP3 Operations
