SMART radio 9, Operating Instructions Manual, Page: 18 / 28

playback problems may occur. CDs of this
type do not conform to the currently
applicable standards.
!
Do not affix stickers or labels to data
carriers.
These may become loose and damage the
CD drive.
Notes on MP3/WMA operation
The CD drive can play audio CDs and CDs
with MP3 or WMA data.
i
MP3 = MPEG1, Audio Layer 3, is an audio
data compression format susceptible to
sound quality impairments. The format
can be created with numerous programs,
some of which are available free of
charge.
WMA = Windows Media Audio is another
audio data compression format and is
also susceptible to sound quality
impairments. It is a component of the
Microsoft
®
Windows
®
platform and can be
generated using the Windows Media
Player
®
, for example.
i
The following points should be taken
into account when using MP3 and WMA CDs:
R
Only MP3/WMA files (titles) that were
burned on a CD using ISO9660/Joliet
file system can be played by the
system.
R
Recording media you have burned
yourself in particular may cause read
errors in rare cases, even where the
medium is recognized correctly in the
normal way.
R
Display of artist, album and title name
is limited to a maximum of 30
characters (depending on which
character set is used).
R
This equipment can play both write-
once CDs (CD-R) and rewriteable CDs
(CD-RW).
R
Multi-session CDs should be finalized
as otherwise playback problems can
occur.
R
Multi-session CDs that contain both
audio tracks and MP3/WMA titles
(mixed mode) are handled according to
what is contained in the first session.
If the first session contains audio
tracks, the CD is treated as an audio
CD. In such cases, any data stored in the
second session cannot be played.
Accordingly, only MP3/WMA titles may
be played back if this is what is
contained in the first session.
R
The maximum number of folders per CD
is 256. The maximum total number of
folders and titles (files) on a CD is 512.
R
When moving between folders and
titles, display and selection of these
is linear. Any existing hierarchical
or nested folder structure is handled
as a linear sequence.
Information regarding MP3 files
R
To display the title, artist and album
name, you need to add the
corresponding data to the MP3 file
before burning (ID3 tags).
R
When compressing MP3 data, we
recommend a constant bit rate of at
least 160 kbit/s. Variable bit rates can
result in the playback time shown
being different to the actual playback
time.
R
The file extension for MP3 files must
be "mp3" and must be separated from
the file name by a full stop. If any other
file extension is used, this will not be
recognized by the equipment.
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