Edirol UA-20 Driver is not installed correctly, Does your computer meet the USB specifications?

Troubleshooting

•Does your computer meet the USB specifications?

If you are using a computer that does not fulfill the electrical requirements of the USB specifications, operation may be unstable. In this case, you may be able to solve the problem by connecting a USB hub.

•Does “Unknown device” appear for “Other device” or “Universal serial bus controller”?

Use the following procedure to delete “Other device” (Universal Serial Bus Controller) “Unknown device”, and then restart your computer.

1.In the Windows Control Panel, double-click System. The System Properties dialog box will appear.

2.Click the Device Manager tab.

3.Double-click“Other device” or “Universal Serial Bus Controller” to display a list of devices.

4.From the list, select the unknown device and click [Delete].

5.In the dialog box that asks you to confirm the deletion, click [OK].

6.Verify that “Other device” or “Unknown device” is not displayed in the list, and click [Close] to close the dialog box.

“Found unknown device” appears even though you installed the driver

If your computer or USB hub has two or more USB connectors, and you connect the UA-20 to a USB connector to which the UA-20 has never been connected before, the “Unknown device” dialog box may appear even on a computer onto which you have already installed the driver.

Refer to Getting Connected and Installing Drivers (Windows) (p. 16), and install the driver once again. This is not a malfunction.

Driver is not installed correctly

As described in Deleting the special driver (p. 79), delete the USB audio device driver that is installed in your computer, and then install the UA-20 driver once again as described in Getting Connected and Installing Drivers (Windows) (p. 16). Also check whether there is an “Unknown device” in “Other devices” or “Universal Serial Bus Controller”.

If you find one, delete it.

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