BMW 2009 5 Series Owner's Manual page 172

2. Move the controller to the left or right to
select "Treble" or "Bass".
3. Turn the controller until the desired setting
is selected.
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.
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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.
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.