Reply to My recordings sound like trash

I just went back and listened to some of my recent mixes and realized they sound like garbage. I record externally to soundforge via an Alesis RCA input to USB device.

My setup is a audio DJ2 to a Xone 22 to the USB device. I get a low level hum and the recording doesn't sound crisp and clean like i would expect.

I also get the same noise when i try and rip vinyl.

Ground loop?