I've disconnected the webcam as suggested but that doesn't work. I've also tried again the suggestion made by Brendon by I'm not getting any sound. The problem seems to be that the "Capture From" box only shows me an internal card, Sigma TelAudio, and it doesn't seem to be recognizing my turntable. I did connect the cable to the Mic input.
With regard to the USB connection, if I disconnect the WebCam as suggested I get "USB" recognition in the "Capture From" box and a "Line In" in the Input Box which doesn't work since I have the red and white cables coming out of the turntable and then the Roxio USB in the computer's USB port.
Any more suggestions please? Thanks