I'm recording through my bluebird blue condenser microphone connected to my M-Audio M-Track Interface that is then obviously connected to my laptop through USB. I find that when I listen to the mic through the direct option the sound is crystal clear, but when I switch to the USB there is a consistent crackling noise. I tried adjusting the gain to make the sound as minimal as possible, but even with zero gain the crackling persisted. It persists to the point that it affects my recordings and make them unusable. At first I though it could be the converter piece that allows me to plug in my headphones to the interface, but problem persisted even with purchase and implementation of a new one. Then I figured it had to be the mic cords (I had gotten them free with a 2 pack of stands from musicians friend.) So I went to my friends to test out a mic cable he knew worked well. I recorded myself talking and the crackling noise had ceased. I then listened a couple times to make sure it was not there. I thought I had solved the problem and my friend let me borrow a couple mic cables, but after I had gotten home I tried testing out recording again and the crackling noise returned! I am very upset and baffled by this occurrence so any help you have would be of assistance. Also my bluebird mic and interface are both brand new and should be working flawlessly. I've heard that if I live near radio towers that can cause interference as well as wifi and other signals, is there validity to this?