Feedback when using 2.10 (or 2.09)

[dtcomposer]

I am running ASIO v. 2.10 on my Windows 7 computer. I recently bought some Behringer Truth monitors and am running them through the UCA 222 USB interface. Now when I try to use ASIO for sounds I get this quiet and persistent pulsating feedback. It is a high sound. I only get this feedback when using asio 4 all. If I run the sounds directly through the speakers using the codec, there is no feedback, but obviously performance suffers greatly. I have tried disabling the mic inputs, and other audio devices. I have checked the outlets and other possible feedback sources, and have found none. I am not that familiar with how ASIO works, so possibly there is some easy solution that I am missing?

Help would be much appreciated,

David

[Peter Aksberg]

Problem with pulsating noise is NOT because of asio 4 all, it appears with Behringer ASIO drivers also.

Tried on several computers, UCA222 was "silent" until ASIO drivers were installed.

[d]

turn off the monitor on the uca222 unit and it eliminates the pulse