2010 Mazda MAZDA3 Owner's Manual - Page 248

Interior Comfort Audio System Bose® Sound System-equipped model Indication Turn Left Turn Right OFF OFF ON ON Select the desired ALC mode. Mode Volume change No change Minimum 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 OFF ON ON ON Medium Maximum Turn the audio control dial to select ALC OFF or ALC LEVEL1―7 modes. The selected mode will be indicated. Select mode 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. Automatic Level Control (ALC) 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. 6-30