2008 Toyota Yaris Owners Manual - Page 604

3-2. Using the audio system n Adjusting sound quality Turning Sound quality mode Bass Treble Front/rear balance Left/right balance or Mode displayed BAS TRE FAD BAL adjusts the level. Turn to the left Low Shifts to rear Shifts to left Turn to the right High Shifts to front Shifts to right 3 Level -5 to 5 -5 to 5 R7 to F7 L7 to R7 n Adjusting the Automatic Sound Levelizer (ASL) - Type B only When "ASL" is selected, turning to the right changes the Interior features "ASL level in the order of the "LOW", "MID" and "HIGH". Turning to the left turns "ASL" off. ASL automatically adjusts the volume and tone quality according to the vehicle speed. 187