Alesis MultiMix12USB Reference Manual page 31

External effects aren't
working.
LED meters not working.
Computer does not see the
Multimix.
Computer sees the Multimix
USB, but no sound is received
and/or transmitted.
USB audio has crackling or
glitches, or audio
plays/records at incorrect
pitch.
No power.
Effects processor is not
plugged in or turned on.
Aux outputs of mixer aren't
connected to inputs of
processor or processor's
outputs aren't connected to
mixer's inputs.
Mixer's effects return signal is
too low.
Nothing is routed to the
HDPH/CTRL RM output.
USB connection must be
established.
Multimix USB is not set as
primary sound device.
USB hub may be in use.
Computer configuration may
be incompatible with USB
audio.
Incorrect or defective power
supply.
Troubleshooting
Make sure unit is plugged in and
turned on.
Make sure the mixer's aux
outputs are connected to the
processor's inputs and that the
processor's outputs are
connected to the mixer's aux
inputs.
Turn up the output of the
effects processor or turn up the
mixer's AUX RET A RETURN
or EFFECTS / AUX RET B
RETURN in the master section.
Press the desired MIX, ALT ¾
or 2 TK button.
Unplug the USB cable and turn
off the Multimix. Turn the
Multimix back on and plug the
cable back in. If this does not
work, leave the Multimix on,
turn off the computer (do not
use "restart" but instead actually
turn off the computer) and then
turn it on again.
In the computer's Control Panel,
go to the Sounds/Multimedia
area. In the Audio section, set
the default sound recording and
playback devices to "USB audio
codec."
If you are using a USB hub,
disconnect the Multimix from it
and connect the mixer to the
computer directly instead.
Certain USB chipsets have
design limitations or IRQ
assignment restrictions that
must be resolved before audio
can work correctly on them.
See your USB chipset
documentation for further
information if required.
Replace with correct power
supply (only use Alesis-
recommended AC output power
supply).
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