PANASONIC CQ-D5501U
Service Manual

E N G L I S H 25

Notes on MP3
What is MP3 ?
MP3 (MPEG Audio Layer-3) is the compression format of digital audio. It is developed by MPEG (Motion Picture Experts Group). Using this compression format, you can record the contents of about 10 music CDs on a single CD (This figure refers to data recorded on a 650 MB CD-R or CD-RW at a fixed bit rate of 128 kbps and a sampling frequency of 44.1 kHz). Note: ¡ MP3 encoding and CD writing software programs are not supplied with this unit.

Display Information
Displayed items
¡ CD-TEXT Disc title Track title ¡ MP3 Folder name File name ¡ MP3 (ID3 tag) Album name Title and Artist name

Recording Recording MP3/WMA files on a CD-media MP3 files on a CD-media
¡ You are recommended to minimize the chances of making a disc that contains both CD-DA files and MP3 files. ¡ If CD-DA files are on the same disc as MP3 files, the songs may not play in the intended order, or some songs may not play at all. ¡ Do not record files other than MP3 files and unnecessary folder on a disc. ¡ The name of an MP3 file should be added by rules as shown in the following descriptions and also comply with the rules of each file system. ¡ The file extension �.mp3� should be assigned to each file depending on the file format. ¡ You may encounter trouble in playing MP3 files or displaying the information of MP3 files recorded with certain writing software or CD recorders. ¡ This unit does not have a play list function. ¡ Although Multi-session recording is supported, the use of Disc-at-Once is recommended. ¡ Packet writing software is not supported.

E N G L I S H 26 1

Supported file systems
ISO 9660 Level 1/Level 2, Apple Extension to ISO 9660, Joliet, Romeo Note: ¡ Apple HFS, UDF 1.50, Mix CD and CD Extra are not supported.

Displayable characters
¡ Displayable length of file name/folder name: within 64 characters. ¡ Name files and folders in accordance with the standard of each file system. Refer to the instructions of writing software for details. ¡ ASCII character set can be displayed. ASCII character set

Points to remember when making MP3 files
¡ High bit rate and high sampling frequency are recommended for high quality sound. ¡ Selecting VBR (Variable Bit Rate) is not recommended because playing time is not displayed properly and sound may be skipped. ¡ The playback sound quality differs depending on the encoding circumstances. For details, refer to the instructions of your own encoding software and writing software. ¡ It is recommended to set the bit rate to �128 kbps or more� and �fixed�.

Compression formats (Recommendation: �Points to remember when making MP3 files� on the previous page)
A to Z, a to z, digits 0 to 9, and the following symbols: (space) ! � # $ % & � ( ) * + , - . / : ; < = > ? @ [ \ ] � _ ` { | } ~
Note: ¡ With some software in which MP3 format files have been encoded, the character information may not be displayed properly. ¡ Undisplayable characters and symbols will be converted into an asterisk ( ).

Compression method MPEG 1 audio layer 3 (MP3) MPEG 2 audio layer 3 (MP3)

Bit rate 32 k - 320 kbps 8 k - 160 kbps

VBR Yes Yes

Sampling frequency 32, 44.1, 48 kHz 16, 22.05, 24 kHz

Folder selection order/file playback order
Maximum number of files/folders
¡ Maximum number of files: 999 ¡ Maximum number of files in one folder: 255 ¡ Maximum depth of trees: 8 ¡ Maximum number of folders: 255 (Root folder is included.)
3 1 2 4

Root Folder (Root Directory) q Folder Selection e In the order File Selection In the order r
8 7 1

Caution
¡ Never assign the �.mp3� file name extension to a file that is not in the MP3 format. This may not only produce noise from the speaker damage, but also damage your hearing.

¡It is recommended that the length of the file name is less than 8 (excluding the file extension).

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8

Note: ¡ This unit counts the number of folders irrespective of the presence or absence of an MP3 file. ¡ If the selected folder does not contain any MP3 files, the nearest MP3 files in the order of playback will be played. ¡ Playback order may be different from other MP3 players even if the same disc is used. ¡ �ROOT� appears when displaying the root folder name.
5 6

w

q

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y

t y Tree 4 Tree 8 (Max.)

Tree 1

Tree 2

Tree 3

Copyright
It is prohibited by copyright laws to copy, distribute and deliver copyrighted materials such as music without the approval of copyright holder except enjoying yourself personally.

No warranty
Above description complies with our investigations as of December 2004. It has no warranty for reproducibility and displayability of MP3.

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CQ-D5501U

CQ-D5501U

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