2009 Toyota 4Runner Navigation Manual - Page 217

08 06.27 AUDIO/VIDEO SYSTEM 6U5004F The touch−screen buttons for radio, CD changer and DVD player operation are displayed on the function touch− screen button display screen when the audio control mode is selected. Touch them lightly and directly on the screen. The selected switch is highlighted. INFORMATION D If the system does not respond to a touch of a touch−screen button, move your finger away from the screen and then touch it again. D You cannot operate dimmed touch−screen buttons. D Wipe off fingerprints on the surface of the display using a glass cleaning cloth. (c) Automatic sound levelizer (ASL) When the audio sound becomes difficult to be heard due to road noise, wind noise or other noises while driving, the system adjusts to the optimum volume according to the noise level. To turn this function on, touch "ASL" on the audio control screen. (d) Tone and balance Tone How good an audio program sounds to you is largely determined by the mix of the treble, midrange, and bass levels. In fact, different kinds of music and vocal programs usually sound better with different mixes of treble, mid−range, 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 if you are 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. 1. Push the "AUDIO" button. 6U5002aF 2. Touch "SOUND" to display the sound adjustment screen. 172