Mercedes-Benz 2010 GLK 350, Operator'S Manual

Page: 150 / 344

File structure on a disc
When you create an MP3/WMA disc, the
MP3/WMA tracks can be organized in
folders.
A folder can also contain other folders.
A disc can contain a maximum of 255 folders.
A folder can contain a maximum of 255 tracks
and 255 subfolders.
A data medium may contain a maximum of
500 tracks.
The directory depth may not exceed a
maximum of 8 levels. The system will ignore
files in lower levels.
Track and folder names
When you create an MP3/WMA disc, you can
assign names to the MP3/WMA tracks and
folders.
The audio system uses these names for the
corresponding display in MP3 mode. Empty
folders or folders which contain data other
than MP3/WMA tracks are not displayed by
the audio system.
If MP3/WMA files are saved in the root
directory itself (uppermost directory on
storage medium), the root directory will also
be treated as a folder. The audio system will
then show the name of the root directory as
the folder name.
You must observe the following when
assigning track names:
R
Track names must have at least one
character.
R
Track names must have the extension
“mp3” or “wma”.
R
There must be a period between the track
name and the extension.
Example of a correct track name:
Track1.mp3
The audio system is unable to recognize an
MP3/WMA track if
R
there is no period between the track title
and the extension
R
there is no extension
i The audio system does not support ID3
tags.
Supported file formats
Supported file formats are:
R
MP3
R
WMA
i
If music files of file formats other than
MP3 are stored together with MP3 files on
one disc, the loading process may take
longer.
Permissible MP3 formats
The audio system supports the MPEG1 Audio
Layer 3 format.
i This format is generally known as “MP3”.
Permissible bit and sampling rates are:
R
fixed and variable bit rates up to
320 kbit/s
R
Sampling rates of 24 kHz – 48 kHz
i Only use MP3 tracks with a bit rate of at
least 128 kbit/s or higher and a sampling
rate of at least 44.1 kHz or higher. Smaller
rates can cause a noticeable deterioration
in sound quality. This is especially the case
if you have the surround sound function
activated.
WMA (Windows Media
®
Audio)
Windows Media
®
Audio (WMA) is an audio
data compression technology developed by
Microsoft
®
.
The audio system supports the following
types of audio files:
R
fixed bit rates of 5 kbit/s up to
384 kbit/s
R
Sampling rates from 8 kHz to 48 kHz
The audio system does not support the
following WMA files:
R
DRM (Digital Rights Management) coded
files
R
variable bit rates
148
Audio system
Controls in detail
X204_AKB; 3; 23, en-US
d2ureepe,
Version: 2.11.8.1
2009-07-16T19:16:58+02:00 - Seite 148