TOYOTA 2011 Corolla - Manual (Page 251)

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3-2. Using the audio system
Type B and C
*: The sound quality level is adjusted individually in each audio
mode.
■ Adjusting the Automatic Sound Levelizer (ASL)
Type A
When “ASL” is selected, turning to the right changes the
amount of “ASL” in the order of “LOW”, “MID” and “HIGH”.
Turning to the left turns “ASL” off.
ASL automatically adjusts the volume and tone quality according to vehi-
cle speed.
Mode
displayed
Sound qual-
ity mode
Level
Turn to the
left
Turn to the
right
BASS Bass* -5 to 5
Low High MID
Mid-range*
(type C only)
-5 to 5
TREB Treble* -5 to 5
FADE
Front/rear
volume
balance
F7 to R7 Shifts to rear
Shifts to
front
BAL
Left/right
volume
balance
L7 to R7 Shifts to left Shifts to right