2011 Lexus IS 350 User Guide - Page 282

3-2. Using the audio system Adjusting the Automatic Sound Levelizer (ASL) Press . is The ASL switches between on and off modes each time pressed. ASL automatically adjusts the volume and tone quality according to the noise level as you drive your vehicle. Adjusting sound quality and volume balance n Changing sound quality modes Press Pressing . changes the sound mode in the following order: Interior features 3 "BAS"→"MID"→"TRE"→"FAD"→"BAL" n Adjusting sound quality Press Mode displayed "BAS"* "MID"* "TRE"* "FAD" or to adjust the level. Level -5 to 5 -5 to 5 -5 to 5 F7 to R7 Shifts to rear Shifts to front Low High Press ∨ Press ∧ Sound quality mode Bass Mid-range Treble Front/rear volume balance Left/right volume balance "BAL" L7 to R7 Shifts to left Shifts to right *: The sound quality level is adjusted individually in each audio mode. 291