4
CDX-T70MX
Q1
What is MP3?
MP3 (MPEG Audio Layer3) is a standard
for compressing audio parts of Moving
Pictures Experts Group (MPEG).
The special feature of MP3 is that the music
data is compressed to about 1/10 of its
original size while retaining the same
sound quality as a CD or an MD.
Compared with an audio disc (maximum
74 minutes running time), MP3 lets you
compress about 10 audio discs or 160 four-
minute songs into a CD-R/RW of 650MB.
Note
Recorded music is limited to private use only. Use
of music beyond this limit requires the permission
of the copyright holders. Copyright law prohibits
copying, distributing, or delivering all or part of
the contents.
Q2
What kind of MP3 files can be
played back?
MP3 files in CD-ROMs, CD-Rs, and CD-
RWs can be played.
Pay attention to the following points when
creating MP3 data CDs using your
computer, CD-R/RW drive, writing
software, or MP3 file.
• The file must be in the ISO 9660 level 1 or
level 2 format, or Joliet or Romeo in the
ISO 9660 expansion format.
A folder name or a file name with the
format other than ISO 9660 level 1 may
not be displayed correctly. When
creating MP3 data CDs, the format of ISO
9660 level 1 is recommended.
• When naming, be sure to add the file
extension “.MP3” to the MP3 file name.
The unit cannot recognize an MP3 file
without the extension “.MP3,” or a file
that is not MP3 format, even with the
extension “.MP3.”
Q3
Is there maximum number of
folders or files to play?
Pay attention to the maximum numbers
mentioned below.
• Maximum folder number in a disc: 255
*
(including root folder and empty folders)
• Maximum file number in a disc: 511
*
*
Maximum number of files and folders:
512
When a file/folder name contains
many characters, this number may
become less than 512.
• The maximum number of trees which
can be played is 8.
The unit allows you to change the folders,
to play just the files in your favorite folder
repeatedly, or to play files randomly, create
folders according to artist name or album,
and put related MP3 files into folders to use
the unit as a CD changer.
Q4
Can the unit play a data CD with
folder levels?
The unit can play a data CD with folder
levels.
Q5
Is there any restriction about the
bit rate regarding playback of
MP3 files?
There is no specific restriction, but a bit rate
of more than 128kbps is recommended
from the perspective of sound quality. The
unit also supports VBR (Variable Bit Rate).
Note
Elapsed playing time may not be displayed
accurately during cue/reverse.
Q6
Does the unit support a disk of
80 minutes running time (700
MB data capacity)?
The unit supports a disk of 80 minutes
running time (700 MB data capacity).
Q7
Can the unit play a CD-R/RW
containing both music CD data
(CD-DA) and MP3 file data?
The first identified file or data will be
played back.
Q8
Can the unit play a disc to which
data can be added (non-finalized
disc)?
The unit can play a non-finalized disc.
Q9
Can the unit play a Multi Session
disc?
The unit can play a Multi Session disc. For
details, refer to the operating instructions.
Q10 Does the unit support Emphasis?
The unit does not support Emphasis.
Q11 What is the sampling rate
supporting the unit?
The unit is supported from 16kHz to
48kHZ.
Q12 Does the unit support the play
list of m3u?
The unit does not support the play list of
m3u.
Q13 Does the unit support ID3-Tag?
The unit supports ID3 tag ver.1.
Pay attention to the following points about
ID3 tag ver.2.
Q14 Is a file name/a folder name of
MP3 different from the name
when creating a data CD (the
name displayed on your
computer)?
On this unit, a file name/a folder name is
displayed as below.
• A file name/a folder name can be
displayed up to 8 characters.
A 9
th
or later character cannot be
displayed or scrolled.
• A folder name or a file name in a format
other than ISO 9660 level 1 may not be
displayed correctly. The file name should
only use one byte uppercase, one byte
numeric characters, or an underscore
(“__”). It should also be no more than 8
characters long, and with no more than
three characters in the extension.
• Japanese phonetic symbols/ Chinese
characters cannot be displayed.
Only one byte uppercase (A-Z), one byte
numeric character (0-9), and one byte
symbol (“_”, “.”, “<”, “>”, “/”, “+”, “
*
”)
can be displayed. One byte lowercase (a-
z) is changed to an uppercase character,
and any other characters are displayed as
“
*
”.
Q15 MP3 files recorded onto a CD-R/
RW cannot be played.
This may happen in following cases.
• The recording method onto CD-R/RW is
the packet write method.
• The extension file is not an “.MP3.”
• The file data is not MP3 format.
• Some recording condition (omission of
data, etc.) or some disc condition (dirt,
crack, curving, etc.) may cause inability
to playback an MP3 file.
Q16 It takes some time to start
playback of MP3 file.
The unit reads the disc information (the
number of folders and files, or the location
of the data) before playback of MP3 file. It
may take more time to start playback of a
disc with many trees.
Please refer to the instruction manual for
details.
Q17 Playback skipping and no
playback occur.
Recording condition onto CD-R/RW
(omission of data, etc.) or disc condition
(dirt, crack, curving, etc.) may cause
playback skipping or no playback.
Q18 Can WAVE files be played back
on this unit?
WAVE files cannot be played back on this
unit.
Q19 Can other compressed formats,
such as ATRAC3, be played back
on the unit?
Only MP3 can be played back on the unit.
MPEG1
48kHz
44.1kHz
32kHz
MPEG2
24kHz
22.05kHz
16kHz
About ID3 tag version 2
Although not a malfunction, the following occurs
when an MP3 file containing ID3 tag ver.2 is
played:
– When skipping a portion of ID3 tag ver.2 (at the
beginning of the track), sound is not output. Skip
time changes depending ID3 tag ver.2 capacity.
Example: At 64 kbytes, it is about 2 seconds
(with RealJukebox).
– The displayed elapsed playing time when skipping
a portion of ID3 tag ver.2 is inaccurate.
For MP3 files of a bit rate other than 128 kbps, time
is not displayed accurately during playback.
– When an MP3 file is created with MP3 conversion
software (ex. RealJukebox
*
), ID3 tag ver.2 will
automatically be written.
*
“RealJukebox is a registered trademark of
RealNetworks, Inc.”
As of December, 2001
011TRACK.MP3
020TRACK.MP3
091TRACK.MP3
100TRACK.MP3
ROOT
01_
ALBUM
02_
ALBUM
10_
ALBUM
: Folder
: MP3 file
001TRACK.MP3
002TRACK.MP3
...
010TRACK.MP3
...
...
FAQ- about MP3 Audio File
