When I download and play the high frequency sweep here: http://www.audiocheck.net/audiotests_frequencycheckhigh.php
There is a second high frequency sweep going back and forth that I can clearly hear. I can hear it in foobar, Winamp with maiko wasapi, and WMP. VLC is fine.
I noticed there was some aliasing on bass too in winamp, but using wasapi seemed to fix that.
Anyone know how to fix this or what could be causing it? I'm using a Xonar STX hooked up to an Asgard. I will try setting up wasapi on foobar to see if that fixes it, but I'd like to avoid using foobar.