compression ratio Seat Leon SC 2013 SOUND SYSTEM 2.0

22Audio modeMedia sourceRequirements for playing in the unitAUX: External audio source.– 3.5-mm connector jack for the emission ofconnectable audio ⇒ page 28.MDI: External data medium.– Compatible with MEDIA-IN multimedia in-terface ⇒ page 30.
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Bluetooth® is a registered trademark of Bluetooth SIG, Inc.
Restrictions and notes
Contamination, exposure to high temperatures and mechanical damage canrender a data medium unusable. Please observe the manufacturer's instruc-tions.
Variations in the quality of data media produced by different manufacturersmay lead to problems during playback.
Please observe copyright laws.
CDs recorded in UDF or Direct CD format cannot be played. Under WindowsVista® ensure that the correct format is selected.
The unit may be unable to read individual tracks or the entire data mediumdue to the data medium configuration or the devices and programs used forrecording. Compatibility with all encoding/recording software, recording de-vices and recording media cannot be guaranteed. Incompatible USB devi-ces can make noise, interrupt playback or not playback at all. Informationabout the best ways to create audio files and data media (compressionrate, ID3 tag etc.) can be found on the Internet.
Due to the larger quantity of data, it takes longer to read a data mediumcontaining compressed audio files (MP3, WMA etc.) than a “normal” audioCD. Complex folder structures can also slow down the reading of a data me-dium.
Playlists only determine a certain playing order. There are no files stored ina playlist. The unit will not play a playlist if the files are not stored on thedata medium at the locations referred to by the playlist (relative file paths).
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Playing order for audio data CDsFig. 14
Example of anMP3 CD structure.
Audio files  on data media are often sorted by folders  and playlists  todetermine a certain playing order.
Tracks, folders and playlists on a data medium are sorted by name in alpha-betic or numeric order.
Subfolders are treated like folders and numbered in accordance with the se-quence on the CD.
The illustration ⇒ Fig. 14 shows a typical MP3 CD that contains tracks ,folders  and subfolders.
Accordingly, the tracks and folders on this CD are played and displayed inthe following order: