Roland Edirol UA-25 Owner's Manual page 60

Troubleshooting
In Windows, Power Management settings in the Control Panel may cause clicks
or pops to occur in the audio playback.
The power management properties that appear when you double-click Power
Management will differ depending on your computer system. The explanation that
follows is for a typical situation, but you should refer to the owner's manual for your
computer to verify these settings.
Some computers may not have the following items.
1.
In the Windows Control Panel, double-click the System icon. The
System Properties dialog box will appear.
2.
Click the Hardware tab.
3.
Click Device Manager to see the list of devices.
4.
From the list, choose Advanced Power Management Support, and click
Properties.
The Advanced Power Management Support Properties dialog box will
appear.
5.
Click the Settings tab, and in Troubleshooting, check the "Don't Poll
Power Supply Status" check box. Then click [OK].
6.
In the System Properties dialog box, click [OK].
7.
Restart Windows.
Could two or more computers be connected to the UA-25 or to your mixer or
audio devices?
Try connecting the UA-25 to only one computer. Check whether the noise disappears
when the UA-25 is connected to only one computer. Connecting numerous audio
devices to a computer may produce noise in some situations. If this occurs, connect only
the UA-25 to your computer.
Are you using a USB device in addition to the UA-25?
Try switching off USB audio devices other than the UA-25.
If you have connected the UA-25 to an external USB hard disk, please connect the UA-
25 directly to a USB connector on the computer itself.
In Windows, you may be able to solve the problem by adjusting the buffer size
in the UA-25 Driver Settings dialog box.
Adjust the buffer size as described in "Adjusting the audio latency" (p. 50).
After changing the buffer size, you must restart any software that uses the UA-25.
If your software has an audio device test function, execute the test function.
* After changing the buffer size, you must be sure to exit, then restart any software that uses
the UA-25.
Are numerous software programs running?
Playback may be interrupted if numerous software programs are running at the same
time, or when you start up another software program. Close any unneeded software,
and try again. If this does not solve the problem, try restarting your computer.
Clicks or pops may occur in the sound if a LAN is operating.
Try disabling the LAN in the Device Manager. If this eliminates the clicks or pops, you
may be able to solve the problem by updating your LAN driver or BIOS.
60