Yamaha RP-U100 Owner's Manual page 55

Opening Page
USB Capture
In tuner mode, the signal that will be recorded by USB capture is the signal from the
internal tuner.
Also when the USB MIX LEVEL setting is active, the mixed signal from a computer
connected with the USB cable cannot be captured.
USB capture details
Muting On/Off
The mute function serves to temporarily cut off the sound. It can be turned
on or off by clicking the Mute button.
Headphones not connected
MUTE OFF
The mute function can only be switched on from the application.
Muting is automatically canceled when the volume is adjusted either on the RP-U100
main unit or with the Application.
Turning the power on or setting the unit to standby also cancels the mute function.
Power On/Standby
Click the Power button
STANDBY.
Mute Function
MUTE ON
Power Control
on the main panel to switch the power between ON and
Headphones connected
MUTE OFF
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MUTE ON