User Manual

Controls and Functions
MG12XUK Owner’s Manual
16
Rear panel
USB section (@4 to @6)
Caution
The unit may heat up by as much as 15 to 20°C while the
power is on. This is normal. Please note that since the panel
temperature may exceed 50°C in ambient temperatures higher
than 30°C, you should exercise caution to prevent burns.
@4 [AC ADAPTOR IN] connector
For connecting the supplied AC adaptor.
@5 [/] switch
For turning the power of the unit to standby ( ) and on
( ). The [POWER] LED !9 on the top panel lights when
the switch is set to on ( ).
NOTE
Rapidly switching the unit between on and standby in succes-
sion can cause it to malfunction. After setting the unit to
standby, wait for about six seconds before turning it on again.
NOTICE
Even when the switch is in the standby ( ) posi-
tion, electricity is still flowing to the unit. If you do
not plan to use the unit for a while, be sure to
unplug the AC adaptor from the outlet.
@6 [USB 2.0] terminal
For connecting to a computer via a commercially avail-
able USB 2.0 cable. (This product does not come with a
cable.) The sound of the stereo bus is output to the
computer. (The [STEREO LEVEL] knob @3 does not
affect the sound.) For inputs and outputs to/from the
computer, you may need a dedicated USB driver. Check
and download the driver at the following Yamaha web
site and install it to the computer before use. The cable
should be no more than 3 meters long.
http://www.yamahaproaudio.com/mg_xu/
 Using the unit connected to a computer
Set the [LINE /USB ] switch !4 of channels 11/12
to [USB ]. Depending on your particular application,
you can specify the output destination and monitoring
sound by selecting the settings of the [TO MON /TO
ST ] switch !2 for channels 11/12 and the [STEREO
MUTE] switch @1. For details, see the chart below.
 Adjusting the playback volume from a computer
(Attenuator)
1. Press the [PROGRAM] knob five times consecu-
tively to display the attenuation value (dB).
2. Turn the [PROGRAM] knob to set it between -24 dB
to 0 dB (minus sign is not displayed).
3. Press the [PROGRAM] knob again to exit the set-
ting. When the attenuator is enabled, the dot lights at
the lower right of the display.
Output Destinations and Monitoring Sound
*1 NOTICE: If you set the switch to [TO ST ] when you use the DAW software, a loop may be produced, possibly resulting in feed-
back.
*2 The audio signal cannot be sent to the computer because it does not pass through the stereo bus.
Application
Selection of the output destination
sent from channels 11/12
Selection of the monitoring sound with the
headphones/monitor speaker
[TO MON /TO
ST ] switch
Output destination
[STEREO MUTE]
switch
Monitoring sound
When recording with
DAW software while lis-
tening to the playback
sound from a computer.
[TO MON ]*1
[MONITOR OUT] jack*2
[PHONES] jack*2
On ( )
The direct sound (of the instrument) input to
the MG12XUK will be muted, allowing you
to hear the playback sound only from the
DAW. (Direct monitoring: Off )
Off ( )
You can hear the mixed sound of the direct
instrument sound input to the MG12XUK
and the playback sound from the
DAW.(Direct monitoring : On)
When playing back
sound from a computer.
For example: BGM play-
back, Internet broad-
casting
[TO ST ]
Stero bus 
[STEREO OUT] jack
Normally set to
Off ( )
You can hear the mixed sound of the instru-
ment sound input to the MG12XUK and the
playback sound from a computer.