MP3 mode23
MP3 modeComments about CD-R (CD Writable) / CR-RW (CD Re-writable) With this unit CD-ROMs, CD-Rs or CD-RWs can be played in CD-DA (Digital
Audio) and MP3 mode.
Depending on the quality of the medium and the characteristics of the
recording some CDs may not be read. Th is is normal and is not a sign of
malfunction.
If a CD-R / CD-RW disc has not been finished, it cannot be played
4).
What are MP3 files? MP3 (MPEG 1 Audio Layer-3) is a standardised technology and format for the
compression of sound sequen ces. The sound file is compressed to about
1/10th of its original size. Sounds th at are out of the human hearing range
are excluded while those that are within the range are compressed.Accepted recording formatsIt is possible to play MP3 files recorded on CD-ROMs, CD-Rs and CD-RWs. The unit supports MP3 discs that have been formatted using the ISO 9660
standard level 1 or 2. The unit can also play discs recorded using the Romeo
or Joliet standard.
The unit will not play CDs recorded using “Packet Writing” (UDF or Direct CD
formats) whether this has been used on the entire disc or within a session. In
this case the display will display an error message and will eject the CD.
ISO 9660 format
This is the most common of international standards for the format logic of
files and folders on a CD-ROM.
There are different levels of specification. For level 1, the names must be in
8.3 format (8 characters maximum for the name of the file + 3 characters for
the extension “.MP3”. Folder names cann
ot be more than 8 letters long. On
the contrary, Level 2 specifications allow up to 31 characters.
Multi-session CDs
This method of recording means that information may later be added to the
CD (while there is enough space remaining and the CD is not closed). The
information on each recorded CD is contained within an area marked by two
data labels called “Lead-in” for the be ginning of the session and “Lead-out”
for the end. A multi-session CD will allow for multiple segments that contain
their own “Lead-in” and “Lead-out”.
Information from the ID3 data fieldThe ID3 data of an MP3 file· contains information about the Artist, Album and
the name of the track.
4)A process required so that a CD-R/CD-RW can be played by an audio CD player. Any CD
with a session open (not finished) will not be recognised and the display will show an
error message.
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