Mazda 2014 Zoom-Zoom User Manual page 297

Interior Features
Audio System
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 (ALC)
changes the audio volume automatically
according to the vehicle speed. The faster
the vehicle speed, the higher the volume
increases. ALC has ALC OFF and ALC
LEVEL 1 to 7 modes. At ALC LEVEL 7,
the amount that the volume can increase is
at the maximum. Select the mode
according to the driving conditions.
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