JVC KD-SX947R: MP3 INTRODUCTION

MP3 INTRODUCTION

Precautions when recording MP3 files

What is MP3?

on a CD-R or CD-RW

MP3 is an abbreviation of Motion Picture Experts

This unit can only read MP3 files that are

Group (or MPEG) Audio Layer 3. MP3 is simply a

recorded in the format that is compliant with ISO

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file format with a data compression ratio of 1:10

9660 Level 1, Level 2, or Joliet.

(128 Kbps*). That means, by using MP3 format,

one CD-R or CD-RW can contain 10 times as

much data volume as a regular CD can.

How are MP3 files recorded

* Bit rate is the average number of bits that one

second of audio data will consume. The unit

and played back?

used is Kbps (1024 bits/second). To get a

better audio quality, choose a higher bit rate.

MP3 “files (tracks)” can be recorded in “folders”

The most popular bit rate for encoding is 128

—in PC terminology.

Kbps.

During recording, the files and folders can be

arranged in a way similar to arranging files and

This unit is incorporated with an MP3 decoder.

folders of computer data.

You can play back MP3 files (tracks) recorded on

“Root” is similar to the root of a tree. Every file

CD-Rs, CD-RWs, and CD-ROMs.

and folder can be linked to and be accessed

from the root.

Compatible with ID3v1 (Version 1)

Extra information data such as album title,

Playback order, file search order, and folder

performer name, song title, recording year, music

search order of the MP3 files recorded on a disc

genre and a brief comment can be stored within

are determined by the writing (or encoding)

an MP3 file.

application; therefore, playback order may be

different from the one you have intended while

This unit can show ID3v1 (Version 1) tags (album

recording the folders and the files.

name, performer name, and song title) on the

display. (See page 27.)

The illustration on the next page shows an

• Some characters cannot be shown correctly.

example of how MP3 files are recorded on a

• This unit is not compatible with ID3v2

CD-R or CD-RW, how they are played back, and

(Version 2).

how they are searched for on this unit.

Other main features in this unit:

Notes:

• Maximum number of folders/files:

• The unit can read a CD-ROM containing MP3 files.

289 (Total)

However, if non-MP3 files are recorded together

• Available characters for folder/file names:

with MP3 files, this unit will take a longer time to

A–Z, 0–9, _ (underscore)

scan the disc. It may also cause the unit to

• Maximum number of characters for file name

malfunction.

(ISO 9660 Level 1): 12 (inclusive of

• The unit cannot read or play an MP3 file without

separation mark—“.”

the extension code—mp3.

and extension code

• This player is not compatible with the data encoded

—“mp3”)

with Layer 1 and Layer 2 formats.

(ISO 9660 Level 2): 31 (inclusive of

• The unit is not compatible with Playlist**.

separation mark—“.”

and extension code

**A playlist is a simple text file, used on a PC, which

—“mp3”)

enables users to make their own playback order

(Joliet): 64 (inclusive of

without physically rearranging the files.

separation mark —“.”

and extension code

—“mp3”)

• Maximum number of characters for folder

name: 64

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MP3 folder/file configuration

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ROOT

Level 1

01

Level 2

02

04

08

Level 3

1 2

3 4

Hierarchy

03

05 09

Level 4

5 6

1110 2120

06 07

Level 5

7

8

9

1312

2322 24

Level 6

15 1614

17

18

19

ROOT

: Root

01

: Folders

: MP3 files

Note:

There is no limit on the number of the hierarchy levels (nested folders). However, up to 8 hierarchy levels is

recommended for stable operations.

MP3 playback/search order

• The numbers in circles below the MP3 files ( ) indicate the playback order and search order of

the MP3 files. Normally, this unit plays back MP3 files in the recorded order.

• The numbers inside the folders indicate the playback order and search order of the folders on an

MP3 disc. Normally, this unit plays back MP3 files in the folders in the recorded order.

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