Toyota Prius Owner's Manual page 260

2. SETUP

AUTOMATIC SOUND LEVELISER
(ASL)
The system adjusts to the optimum vol-
ume and tone quality according to ve-
hicle speed to compensate
increased vehicle noise.
1
Touch "Automatic sound leveliser".
2
Touch "On" or "Off".

SURROUND FUNCTION
This function can change a feeling of
presence.
1
Touch "Surround".
2
Touch "On" or "Off".
 The surround function will turn on.
TONE AND BALANCE

TONE
How good an audio program sounds is
largely determined by the mix of the
treble, mid and bass levels. In fact, dif-
ferent kinds of music and vocal pro-
grams usually sound better with
different mixes of treble, mid and bass.
260

BALANCE
A good balance of the left and right ste-
reo channels and of the front and rear
sound levels is also important.
for
Keep in mind that when listening to a
stereo recording or broadcast, chang-
ing the right/left balance will increase
the volume of 1 group of sounds while
decreasing the volume of another.
1
Press the "SETUP" button.
2
Touch "Audio" on the "Setup" screen.
3
Touch the "Sound" tab to display this
screen.
PRIUS + (EE) NAVI 47761E
14.02.07 10:37