2009 Mazda CX-9 Owner's Manual - Page 270

Interior Comfort Audio System (5.1-channel sound mode) Indication Turn Left Turn Right OFF ALL ON Rr Automatic Level Control (ALC) (Standard audio-equipped model) The automatic level control is a feature that automatically adjusts audio volume and sound quality according to the vehicle speed. The volume increases in accordance with the increase in vehicle speed, and decreases as vehicle speed decreases. Select the desired ALC mode. Mode Volume change No change Minimum Medium Maximum Select mode Decrease Increase bass bass Decrease Increase treble treble Shift the Shift the sound to the sound to the front rear Shift the Shift the sound to the sound to the left right OFF OFF 12Hr (Flashing) ON ON 24Hr (Flashing) The display switches to the 5.1-channel sound mode when the following conditions are met: l The vehicle is Rear Entertainment System equipped. l The mode is switched to "RSES" (page 6-59). l A CD or a DVD is inserted in the Rear Entertainment System or the sound of the disc is 5.1 Dolby Digital/DTS audio. NOTE About 5 seconds after selecting any mode, the volume function will be automatically selected. To reset bass, treble, fade, and balance, press the audio control dial for 2 seconds. The unit will beep and "CLEAR" will be displayed. Turn the audio control dial to select ALC OFF or ALC LEVEL1―3 modes. The selected mode will be indicated. 6-30