OTHER CONTROLS AND EQUIPMENT
MP3
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Do not write files other than MP3/WMA
files and unnecessary folders on a disc.
MP3/WMA files should be named to
meet the standards and the file system
specifications as shown below.
The file extension “.mp3” or “.wma”
should be assigned to files based on
their format independently.
You may encounter a trouble in playing
MP3/WMA files or displaying informa-
tion of MP3/WMA files depending on
the writing software or CD recorder in
use.
Notes on MP3/WMA
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It is recommended to set the bit rate to
“128 kbps or more” and “fixed”.
What is MP3/WMA?
MP3 (MPEG1/2 Audio Layer-III) and WMA
TM
(Windows Media
Audio) are the com-
WMA
pression formats of digital audio. The
former is developed by MPEG (Motion Pic-
ture Experts Group), and the latter is
developed by Microsoft Corporation.
Using these compression formats, you can
record contents of about 10 music CDs on
a single CD media. (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.)
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It is recommended to set the bit rate to
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“64 kbps or more” and “fixed”.
Do not set the copy protect attribute on
the WMA file to enable this unit to play-
back.
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NOTICE
Never assign the “.mp3”, or “.wma”
file name extension to a file if it is not
in the MP3/WMA format file. Failure to
observe this may result in damage to
the speaker due to noise production.
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This unit does not have a play list func-
tion.
It is recommended to write discs in
Disc-at-Once mode even though Multi-
session mode is supported.
Points to remember when making MP3/
WMA files
Common
Recording MP3/WMA files on a CD
media
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High bit rate and high sampling fre-
quency are recommended for high
quality sounds.
Selecting VBR (Variable Bit Rate) is not
recommended. Selecting VBR may
cause display of incorrect playing time
and jumpiness of playback.
Compression formats
MP3
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It is recommended not to write both
CD-DA files and MP3/WMA files on a
disc.
Bit rate:
MPEG1 Audio Layer III: 64 k - 320 kbps
MPEG2 Audio Layer III: 64 k - 160 kbps
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If both CD-DA files and MP3/WMA files
are on the same disc, tracks may not
be played in the correct order or some
tracks may not be played at all.
When storing both MP3 data and WMA
data on the same disc, sort and place
them in different folders.
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Sampling frequency
:
MPEG1 Audio Layer III: 32 k/44.1 k/48 kHz
MPEG2 Audio Layer III: 16 k/22.05 k/24 kHz
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Playback sound quality varies depend-
ing on the encoding environment. For
details, refer to the user manual of the
encoding software and the writing soft-
ware in use.
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WMA (Ver.7, Ver.8)
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Bit rate: CBR 48 k -192 kbps
Sampling frequency: 32 k/44.1 k/48 kHz
5-27
58MS0-14E