2012 Toyota Highlander Owners Manual - Page 319

3-2. Using the audio system Mode displayed BASS MID TREB FADE Sound quality mode Bass* Mid-range* (type B only) Treble* Front/rear volume balance Left/right volume balance Level -5 to 5 -5 to 5 -5 to 5 F7 to R7 Turn to the left Turn to the right Low High Shifts to rear Shifts to front BAL L7 to R7 Shifts to left Shifts to right 3 *: The sound quality level is adjusted individually in each audio mode.