Mazda 3 Owner's Manual page 286

Interior Features
Audio System
NOTE
If not operated for several seconds, the
display returns to the previous display. To
reset bass, treble, fade, and balance, press
the menu button ( ) 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.
*
BT SETUP mode
Music and other audio such as voice data
recorded on portable audio devices and
mobile phones available on the market
®
which are equipped with the Bluetooth
transmission function can be listened to
via wireless transmission over the vehicle's
speakers. Using the BT SETUP mode,
these devices can be programmed to the
®
Bluetooth unit or changed (page 5-78 ).
Time adjustment
Rotating the audio control dial switches
the display between 12 and 24-hour clock
time (page 5-30 ).
*
5–29
Some models.