Bit/Sampling Rates; Copyright; Formats - Mercedes-Benz Audio 20 2012 Operating Instructions Manual

Track and file names
Audio 20 does not support ID3 tags. Music
files can contain meta information such as
artist, album or track names. Audio 20
displays this information during playback.
When you create a disc with compressed
music files, you can assign names to the
tracks and folders. Audio 20 displays these
names if no meta information is available.
If MP3 or WMA files are stored in the root
directory itself, the root directory will also be
treated as a folder. Audio 20 will then show
the name of the root directory as the folder
name.
You must observe the following when
assigning track names:
track names must have at least one
R
character.
track names must have the extension
R
"mp3" or "wma".
there must be a dot between the track
R
name and the extension.
Example of a correct track name:
"Track1.mp3".
Permissible formats
Audio 20 supports the following formats:
MPEG1 Audio Layer 3 (MP3)
R
Microsoft Windows Media Audio V2, V7, V8
R
and V9 (WMA)
music files in AAC format with the aac and
R
m4a extension, but not copy-protected
iTunes music files with the extension
"m4p".
i
If, in addition to MP3 files, there are other
music files in these audio formats stored on
the disc, the loading process may require a
longer time before the first track is played.
i
The MP3 audio encoding method is under
license from Fraunhofer IIS (Institut
Integrierte Schaltungen – Institute for
Integrated Circuits) and Thomson.
Audio CD and MP3 mode
Permissible bit and sampling rates
Audio 20 supports the following types of
MP3 files:
fixed and variable bit rates from 32 kbit/s
R
to 320 kbit/s
sampling rates of 8 kHz to 48 kHz
R
Audio 20 supports the following types of
WMA files:
fixed bit rates from 5 kbit/s to 384 kbit/s
R
sampling rates of 8 kHz to 48 kHz
R
Audio 20 does not support the following
types of WMA files:
DRM (Digital Rights Management)
R
encrypted files
variable bit rate
R
WMA Pro
R
5.1 Surround
R
i
Only use tracks with a bit rate of at least
128 kbit/s and a sampling rate of at least
44.1 kHz. Lower rates can cause a
noticeable deterioration in quality. This is
especially the case if you have activated a
surround sound function.
Notes on copyright
MP3 or WMA tracks that you create or play
back are generally subject to copyright
protection in accordance with the applicable
international and national regulations.
In many countries, reproductions, even for
private use, are not permitted without the
prior consent of the copyright holder.
Make sure that you know about the applicable
copyright regulations and that you comply
with these.
If you own these rights yourself, e.g. for your
own compositions and recordings, or if the
copyright holder has granted you permission,
these restrictions do not apply.
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