MOTU 3160 M6 USB-C Audio/MIDI Interface

User Manual - Page 9

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M6 Quick Reference
1. Use these GAIN knobs to add up to 60 dB of boost to the input
signal for each mic input. Watch the input level meter in the LCD
while adjusting gain. Try to adjust gain as high as possible
without clipping, which is indicated by the red rectangle at the
top of the meter.
2. INPUT MONITOR MIX: Controls the balance (relative volume)
between computer output (over USB) and live inputs being
monitored through the hardware using the MON (monitor)
button (12). Turn it counterclockwise to hear more inputs; turn
it clockwise to hear more computer audio.
3. The full-color, high-resolution LCD (160x120 pixels) shows full-
length meters for all inputs and outputs. An overloaded input
signal is indicated by a red box at the top of the signal. If you see
the red box, reduce the signal level. A blue box around the input
channel number indicates that hardware (direct) monitoring
(the MON button) is engaged for that channel.
4. Volume control for the MONITOR outputs on the back panel. If
you are using the A/B speaker select mode, this controls the
volume of either your A speakers or B speakers (whichever is
currently selected).
5. Volume control for headphone output below it.
6. Both headphone outputs mirror the signal on the MONITOR 1-2
outputs (on the rear panel). Engage the 3-4 switch to monitor
LINE OUT 3-4 instead on this headphone output. This allows you
to set up a separate mix from your host software for this
headphone output.
7. Volume control for headphone output below it.
8. Connect your headphones here. This signal matches the signal
on the MONITOR 1-2 outputs on the rear panel, but volume
control (5 and 7) is independent.
9. Engages hardware (direct) monitoring for inputs 5-6 on the
rear panel. See (12) below for more information.
10. Press and hold the A/B switch to enable or disable A/B mode.
When enabled, you can connect a 2nd pair of “B” monitors to
Line Out 3-4. Then, quickly press the A/B button to switch
between the A monitors (connected to MONITOR Outs 1-2) and
the B monitors (connected to Line Out 3-4) to compare your mix
on the two sets of monitors. For details, see “A/B monitor
switching on the M6” on page 19.
11. Engage the 48V button to turn on phantom power for a
condenser microphone connected to the input.
12. Engage the MON (monitor) button to enable hardware (direct)
monitoring, which routes the channel’s input signal directly to
the MONITOR 1-2 outputs and pans the mono signal evenly
across both outputs. A blue box appears around the input
channel number in the LCD to indicate that hardware monitor-
ing is engage. Press and hold the MON button to engage stereo
monitoring for input pairs. In this mode, Input 1 is routed to
Output 1 and Input 2 is routed to Output 2, allowing you to
monitor in stereo while recording in stereo. Inputs 3-4 are
similarly routed to Outputs 1 and 2 (3 to 1 and 4 to 2).
13. POWER SWITCH: You can switch off the M6 and turn it back on
without restarting your computer.
14. Connect MIDI gear to these standard MIDI ports.
15. Connect these balanced, DC-coupled quarter-inch outputs to
your secondary (B) studio speakers, PA or other desired audio
destination. They can also accept an unbalanced plug (see the
note below about unbalanced connections). Each output pair is
independent and can be found as separate output pairs in your
host software.
16. Connect these balanced, DC-coupled quarter-inch outputs to
your primary (A) studio speakers, PA or other desired audio
destination. They can also accept an unbalanced plug. Each
output pair is independent and can be found as separate output
pairs in your host software.
Note: the analog outputs are not cross-coupled. Therefore,
when connecting them to an unbalanced input, use a TRS plug
with the ring disconnected. Not floating the negative terminal
will short it to the sleeve ground and cause distortion.
17. These LINE INPUTS accept either a balanced or unbalanced
plug. Connect a keyboard or other similar line level audio
source.
18. These four XLR/TRS combo jacks accept a mic cable or a quarter-
inch cable, balanced or unbalanced, from a guitar or line level
source.
19. Connect the M6 to your host computer with the supplied USB
cable. When the M6 is connected to a USB-C host computer or
iPad, it can be powered by its USB connection to the host. When
connected to a USB-A host computer, you’ll need to connect the
DC power adapter to supply enough power.
20. Connect the DC power adapter here. It is optional, unless the
M6 is connected to a USB-A host that cannot supply enough bus
power. You can also power the M6 when no host is connected.
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