What is MP3?

E N G L I S

CD/MP3 Player (continued)

E N G L I S

This player allows you to play MP3 files recorded on CD-ROMs, CD-Rs

Folder selection order/MP3 file playback order (Example)

(Recordable), CD-RWs (Rewritable).

MP3, short for MPEG-1 Audio Layer 3, MPEG-2 Audio Layer 3 LSF (Low Sampling Frequency), is a standard for compress- ing digital video data adopted for video CDs and similar media. It is one of the audio compression systems covered by MPEG's (Motion Picture Experts Group) digital audio compression standards. What it does is reduce the number of bytes in a song without detracting from the sound quality by eliminating big sound waves within the sound range that are imper- ceptible to the human ear. This compression allows you to reduce the contents of a conventional music CD by a factor of around 10. This means that you can record the contents of 10 music CDs on a single CD-R or CD-RW. (The figures refer 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.)

: MP3 files are included : No MP3 files

1	Root Folder

Playing Folder		2
Playing Folder
Folder in the next	1	3
lower level of tree
Current playing file
		4
	Root	Tree 1

Notes:

:[]][[]

:[}][{]

Tree 2

Points to Remember When Recording an MP3 Disc

■Converting (encoding) audio data to an MP3 file

¡It is recommended that you set the bit rate to “128 kbps or more” and “Fixed”.

¡Bit rate of 8 kbps for MPEG-2 and sampling frequency of 16 kHz for MPEG-2 can not be reproduced. ¡VBR (Variable Bit Rate) is not supported.

(Root Directory)

2		Folder Selection
	q	In the order
5		1 ~ 6
3		e

wFile Selection In the order

6 ~

4	q r
r
Root Tree 1 Tree 2	Tree 3

¡This unit counts the number of folders irrespective of the presence or absence of 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’s folder name.

¡The playback sound quality differs depending on the encoding software and the bit rate. For details refer to the user manual of your encoding software.

■Recording MP3 files on a CD-R/RW

¡Do not record files other than MP3s or unnecessary folders on a disc. If many folders or files other than MP3s are recorded on a disc, it may take some time before playback starts.

¡Use ISO 9660 file system (Extension of the ISO 9660 file systems are included.) (a page 45). APPLE HFS file system is not supported. If files do not conform to ISO 9660 file system, they may not play normally, or the file or folder names may not be displayed correctly.

¡Make sure to add the “.mp3” extension to each MP3 file name. A file with a different file name extension or none at all will not play.

¡Although Multi session recording is supported, the use of Disc-at-Once is recommended. Make sure to close the session when you finished recording on a disc.

¡Discs recorded by the packet writing software are not supported.

¡A playlist function is not supported. Record files and folders in the order in which you want them to be played. Some writing software lets you specify the recording order by adding a prefix in the range of “01” - “99”, etc. to the file name. For details refer to the user manual of your writing software.

Notes:

¡You may encounter trouble in playing MP3s or displaying the information of MP3 files recorded with certain writing software or CD recorders (CD-R/RW drives).

¡If a disc contains both MP3 and CD-DA, only CD-DA data is reproduced properly. (MP3 files are played but no sound is output).

Maximum number of files/folders

¡Maximum number of trees: 8

¡Maximum number of folders: 254 (Root folder is not included.)

¡Maximum number of files: 512

Note: If the number of files and folders exceeds the number mentioned above, successful playback may not be performed.

Supported file systems and file names

	Supported file system	Displayable folder names and file names

	ISO 9660 Level 1/Level 2	Name files and folders in accordance with the standard of each file system.
	ISO 9660 Level 1/Level 2	Refer to the instructions of writing software for details.
		Refer to the instructions of writing software for details.
		¡This player can display file names of up to 31 ASCII characters set in scroll

	Joliet*	mode.
	Joliet*	* Up to 15 letters can be displayed when scrolling in the Joliet system.

		According to the standard, “á”, “ç”, etc. can be used. However, this unit can
	Romeo	not display those letters.
		¡The unit recognizes only the ASCII character set. Chinese characters, accented

	Apple Extension to ISO 9660	French characters and accented Spanish characters will be converted into aster-
	Apple Extension to ISO 9660	isks.
		isks.

Note: MP3 encoding software and writing software are not supplied with this model.

Warning: Never assign the “.mp3” file name extension to a file that is not in the MP3 format. This may produce noise from the speakers and cause speaker damage and can damage your hearing.

Copyright

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

No warranty

Above description complies with our investigations as of December 2003. There is no warranty for reproducibility and dis- playability of MP3.

CQ-VD7700U/VD7500U

Panasonic CQ-VD7700U, CQ-VD7500U What is MP3?, Converting encoding audio data to an MP3 file