I am getting a terrible buzzing noise, when I connect my computer audio out to my receiver. My computer has 3.5 mm mini plug output. I am converting to RCA and connecting to the tape input of my receiver. I can hear the audio content, but there is a significant buzzing in the signal. I have gone over the settings of the computer, and can surmise, it must be a grounding issue or something like that. Any ideas how to remedy this?