2013 Lexus ES 300 Owners Manual - Page 1060

1. AUDIO/VIDEO SYSTEM OPERATION AUTOMATIC SOUND LEVELIZER (ASL) The system adjusts to the optimum volume and tone quality according to vehicle speed to compensate for increased vehicle noise. TONE AND BALANCE TONE 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 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 1 group of sounds while decreasing the volume of another. 1 Select "Automatic Sound Levelizer". 2 Select "On" or "Off". SURROUND FUNCTION This function can create a feeling of presence. 1 Select "Surround". 2 Select "On" or "Off". 5 AUDIO/VIDEO SYSTEM 1 Select the "Sound" tab to display this screen. 213 ES350/300h_Navi_OM33A07U_(U) 12.05.11 08:14