2013 Toyota Corolla Owners Manual - Page 517

1. AUDIO SYSTEM OPERATION 3 Touch the "DSP" tab to display this screen. Without JBL sound system SURROUND FUNCTION (IF EQUIPPED) 1 2 Touch "On" of "Surround". Touch "OK". TONE AND BALANCE TONE With JBL sound system How good an audio program sounds is largely determined by the mix of the treble, mid and bass levels. In fact, different kinds of music and vocal programs usually sound better with different mixes of treble, mid and bass. BALANCE 4 Touch the desired screen button. A good balance of the left and right stereo channels and of the front and rear sound levels is also important. Keep in mind that when listening to a stereo recording or broadcast, changing the right/left balance will increase the volume of one group of sounds while decreasing the volume of another. AUTOMATIC SOUND LEVELIZER (ASL) The system adjusts to the optimum volume and tone quality according to vehicle speed to compensate for increased vehicle noise. Without JBL sound system 1 2 Press the "AUDIO" button. Touch . 1 2 1 2 Touch "High", "Mid" or "Low" of "Automatic Sound Levelizer". Touch "OK". With JBL sound system Touch "On" of "Automatic Sound Levelizer". Touch "OK". 18