Yamaha 01x Service Manual page 104

O1X
ABOUT CONNECTIONS WITH EXTERNAL DEVICES WHEN USING THE
01X WITH A COMPUTER
When using audio devices, musical instruments and computers
at the same time, there is bound to be some noise in the system,
the amount of which depends on the connections. Knowing how
to minimize noise is extremely important when designing and
setting up a studio.
As advanced as the 01X is, it too is susceptible to noise. Various
types of noise may be generated and recorded to your audio
sequencer, depending on the power sources/ grounding scheme
and how the various devices are connected.
There is no ideal way to completely eliminate such noise.
However, one can decrease noise by isolating the cause and
applying a suitable remedy. Below are a couple of examples
that may apply.
• High- pitched buzzing or whirring operation noise
in the computer
This is caused by operation noise of the computer leaking to
other devices through the mLAN cable or audio cable, and may
be caused by improper grounding of the power source.
• Low humming noise
Noise of this type is generally due to improper grounding of the
power source.
NOTE
• The noise may differ depending on the circumstances
(specifications of each device and locations of use).
If problems like these happen, try the following measures to
minimize the noise.
NOTE
• If the noise disappears when turning down the volume of the
01X and/or if the noise persists even when disconnecting the
mLAN cable or turning off the computer, other reasons for the
noise are likely. Refer to the Troubleshooting section in the
Owner's Manual.
104
1
Use balanced cable connections when connecting analog
audio. By using proper balanced connections, you can
minimize the noise.
NOTE
• This may have no effect depending on the specifications of the
connected device.
Recommended Cables
• 01X Inputs
Outputs of connected devices
Balanced TRS 1/4" phone / XLR
(mixer, mic
TRS 1/4" phone / XLR
preamp, etc.)
Unbalanced Unbalanced 1/4" phone
(MIDI tone gen-
Unbalanced 1/4" phone
erator, etc.)
• 01X Outputs
01X outputs
(MONITOR OUT, STEREO/AUX OUT)
Unbalanced Unbalanced 1/4" phone
2
Insert a conventional direct box (passive, with transformer
and ground lift switch) for connecting the audio (analog)
cable.
NOTE
• You may want to use several direct boxes when connecting
multiple devices.
Example: MONITOR OUT of 01X – [direct box] – powered speaker
Synthesizer – [direct box] – 01X
3
Changing the power source for each device.
01X
01X inputs (balanced)
inputs
XLR balanced cable Ch. 1-2
TRS phone balanced cable Ch. 3-8
XLR balanced cable Ch. 1-2
TRS phone balanced cable Ch. 3-8
Inputs of connected
—
devices (balanced)
TRS phone/XLR balanced
—
cable