2008 Mercedes C-Class Owner's Manual - Page 192

Controls in detail Audio system On function of the harman/kardon LOGIC7® Surround Sound system permits the playback of discrete 5.1 and stereo recordings with an optimal surround sound platform for each passenger. The LOGIC7® distributes the 5.1 surround information over the 13-channel system architecture to provide the optimum sound experience from all seats. This produces the sound characteristic as intended by the sound engineer during the original recording. Harman/kardon LOGIC7® converts all two-channel stereo sound material into multi-channel surround sound. The surround information stored during the original recording is read out using LOGIC7® and likewise distributed over the 13 channels. No effects are created during this process; only that which was already there becomes audible. In addition, harman/kardon LOGIC7 moves the perceived sound source away from the individual loudspeakers, thus generating a natural 360° sound experience for each passenger. ® i The LOGIC7® Adjusting surround sound With surround sound, you can choose between LOGIC7® On and LOGIC7® Off. Select Sound Sound. i Balance and fader will be set to the default value (0/0) automatically by activating or deactivating LOGIC7®. i Please note the following: For an optimal sound experience from all seats, the balance and fader should be adjusted to the center of the passenger compartment with LOGIC7® switched on. The best sound results are achieved when playing high-quality audio CDs. For MP3 tracks, the bit rate should be at least 128 kbit/s. A dot R indicates the current setting. To select a setting: Slide rmq or rotate ymz. To save setting: Press n. The setting is stored and the menu is exited. To exit menu without saving: Press button í or slide omp. Surround playback cannot be activated in mono-signal sources as AM or Weatherband. It will not function for mono-signal sources as, e.g. mono audio tracks on some specific audio CDs. In the case of poor radio reception quality, e.g. in tunnels, LOGIC7® should be switched off, as otherwise a dynamic switchover from stereo to mono and thus temporary sound characteristic shifts can occur. With certain stereo recordings, the resulting sound characteristic may deviate from conventional stereo playback. i By selecting LOGIC7® Off, all compatible formats are played back as they are present on the medium. Due to the vehicle's spatial characteristics, an optimal sound experience is not ensured from all seats. 191