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2
About MP3 files (3)
MP3 (MPEG 1 Audio Layer-3) is a standard
technology and format for compressing a sound
sequence. The file is compressed to about 1/10 of
its original size. Sounds outside the range of
human hearing are compressed while the sounds
we can hear are not compressed.
Notes on discs
You can play MP3 files recorded on CD-ROMs, CD-Rs
(recordable CDs), and CD-RWs (rewritable CDs). The
disc must be in the ISO 9660*
1
level 1 or level 2
format, or Joliet or Romeo in the expansion format.
You can use a disc recorded in Multi Session*
2
.
*
1
ISO 9660 Format
The most common international standard for
the logical format of files and folders on a CD-
ROM. There are several specification levels. In
level 1, file names must be in the 8.3 format (no
more than eight characters in the name, no
more than three characters in the extension
“.MP3”) and in capital letters. Folder names
can be no longer than eight characters. There
can be no more than eight nested folder levels.
In level 2, file names can be up to 31 characters
long (including the delimiter, the dot “.”, and
the extension “. MP3”). Each folder can have
up to 8 trees.
For Joliet or Romeo in the expansion format,
make sure of the contents of the writing
software, etc.
*
2
Multi Session
This is a recording method that enables adding
of data using the Track-at-Once method.
Conventional CDs begin at a CD control area
called the Lead-in and end at an area called
Lead-out. A Multi Session CD is a CD having
multiple sessions, with each segment from
Lead-in to Lead-out regarded as a single
session.
CD-Extra:A format that contains audio tracks
(audio CD data) in Session 1, and a data track
in Session 2.
Mixed mode CD:A format that contains a data
track and audio tracks (audio CD data) in a
session.
Notes
• With formats other than ISO 9660 level 1, folder
names or file names may not be displayed correctly.
• When naming, be sure to add the file extension
“.MP3” to the file name.
• If you put the extension “.MP3” to a file other than
MP3, the unit cannot recognize the file properly
and will generate random noise that could damage
your speakers.
3disc type
Video CD
audio CD
disc size
12 cm*
12 cm*
maximum
playback time
74 minutes
74 minutes
Information about discs (2)
About Video CDs
A compact disc that contains moving pictures.
The picture data uses the MPEG 1 format (Video
CD), a worldwide standard of digital
compression technology.
Video CDs also contain compact audio data.
Sounds outside the range of human hearing are
compressed while the sounds we can hear are
not compressed.
About audio CDs
Notes on CD-R/CD-RW discs
• You can play CD-Rs (recordable CDs)/CD-RWs
(rewritable CDs) on this unit.
•Some CD-Rs/CD-RWs (depending on the equipment
used for its recording or the condition of the disc) may
not play on this unit.
• You cannot play a CD-R/CD-RW that is not finalized*.
* A process necessary for a recorded CD-R/CD-RW disc to
be played on the audio CD player.
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Folder
MP3 file (track)
1
2
3
4
5
6
1
2
3
4
7
8
5
6
7
8
9
label on the disc
The playback order of the MP3 files
The playback order of the folders and MP3 files is
shown in the illustration.
Notes
•A folder that does not include an MP3 file is skipped.
• When the reset button of the connected car audio is
pressed, the unit will automatically be activated and
read information of the CD in the unit. When the CD
information in the unit has been read, the unit will
automatically stop operation. Depending on the
recording method, it may take some time to stop the
operation even if you set the ignition key to OFF
during disc reading. This is not a malfunction.
• The following discs take a longer time to start
playback.
–a disc recorded with complicated tree structure.
–a disc recorded in Multi Session.
–a disc to which data can be added.
We recommend that you make only one or two trees
for each disc.
• Depending on the disc condition, the unit may not
play some discs.
• Maximum folder number in a disc: 255 (including root
folder and empty folders)
• Maximum MP3 file number in a disc: 999
Tip
To specify a desired playback order, input the order by
number (e.g., “01,” “02”) before the folder or file
name, then record contents onto a disc (The order
differs depending on the writing software).
Cautions when playing a disc recorded in Multi Session
• Regarding CD-Extra, you can only play audio tracks
(audio CD data) on the disc.
• Regarding Mixed mode CD written by Disc-at-Once,
you can play both audio tracks (audio CD data) and
MP3 files on the disc.
• Regarding Mixed mode CD not written by Disc-at-
Once, you can only play MP3 files on the disc.
About display items
Notes on display items in the display window of
connected optional units
• Folder, directory, and album mean the same thing
containing some MP3 files in a disc. MP3 file means a
track.
• Folder name and MP3 file name can be displayed
with up to first 8 characters of the name.
• Characters such as “A-Z,” “0-9,” and “_” can be
displayed.
•
Some characters cannot be displayed. Characters and
signs which cannot be displayed appear as “ *.”
•
Up to the 499th MP3 file, MP3 file numbers are
displayed fully. On and after the 500th MP3 file, MP3
file numbers are displayed with only the last two digits.
• When this unit is connected to an optional Sony BUS
compatible master unit available for album jump
function*;
– Album number remains “1” in the display window
or on the monitor though you have applied
operations for album jump.
– MP3 file number appears as the added MP3 file
number. It is numbered from the first MP3 file on
the disc.
* With a Sony master unit without album jump function
connected, the function is not available.
Note on character codes
Character codes vary depending on the master unit.
For details, refer to the operating instructions for the
master unit.
Note on display of playing time
In the following cases, elapsed playing time may not be
displayed accurately.
– when an MP3 file of VBR (variable bit rate) is played.
– during fast-forward/reverse.
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Tree 1 Tree 2 Tree 3 Tree 4 Tree 5
(root)
* You cannnot play 8 cm CDs.
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