Toyota Corolla 2016 Owner's Manual page 302

300
5-12. Setup (Multimedia system)
Automatic sound leveliser (ASL)
Select "Automatic Sound Levelizer".
1
Select "High", "Mid", "Low" or "Off".
2
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About Automatic Sound Leveliser (ASL)
ASL automatically adjusts the volume and tone quality according to the vehi-
cle speed.
I n f o r ma t i o n P r o v i d e d b y :