BMW 2007 M6 Owner's Manual page 156

Balance and fader
You can adjust the volume distribution in the
same manner as "Treble / Bass".
> "Balance": left/right volume distribution
> "Fader": front/rear volume distribution
Speed-dependent volume control
The speed-dependent volume control
increases the volume with increasing speed.
You can set various stages for the increase in
volume.
1. Select "Speed volume" and press the con-
troller.
2. Turn the controller:
The adjustment is applied; the field can be
changed.
Individual high-end sound system*
You can choose between Stereo and Surround.
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1. Select "Surround Settings" and press the
controller.
2. Select "Stereo" or "Surround".
3. Press the controller.
The spatial sound effect is activated.
Professional LOGIC7 HiFi System*
You can select a spatial sound effect that
improves the spatial acoustics in all frequency
ranges.
1. Select "Surround Settings" and press the
controller.