Pulsing noise recording with Quad-Capture & Sonar X2
When I record audio I get a regular clicking or pulsing noise on playback. I estimate the frequency of the clicks to be about 10/second. The noise shows up with playback on on both speakers and headphones.
Hardware & software are:
Quad-Capture
Shure Condenser Mic - phanto power on
Dell desktop computer w/Windows 7
Sonar X2 Essential
What I've tried:
Running a ground wire from the Quad-Capture to the conputer power supply
Switching USB ports
Grounding Lift settings - both normal and lift
Any help would be appreciated!