Edirol UA-20 Owner's Manual page 65

A substantial amount of noise is present in the guitar
sound
Does the noise decrease when you turn down the volume of your guitar?
If the noise decreases when you turn down the volume of your guitar, the guitar pickup
may be affected by noise from your computer or display. Try locating the guitar as far
away from the computer as possible.
Insufficient volume from your guitar
Connect your guitar to input jack L.
Set the Input select switch to GUITAR.
Insufficient volume from a mic
Is the Input volume raised appropriately?
Turn the knob clockwise to adjust the volume.
Others
The volume changed when you resumed from Suspend
or Hibernation status
When Windows 2000 resumes from Suspend or Hibernation, the output volume
setting is changed due to a problem of Windows.
Using the Windows volume controls, adjust the USB audio (speaker) volume slider.
Appendices
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