When I plug a stereo mini plug from my computer's Line Out into an adapter, then into one of my home receive's RCA inputs, I get a hum. It sounds like an electrical/voltage hum problem since it is there even when no music is playing. I have a generic sound card and a Sony home receiver. The cable running between the two is 10 feet long so I thought it might be picking up interference from AC cords in it's path but the hum remains when I move the audio cable away from power cords. The hum is so powerful, I can hear it even when my home receiver is set on a different input, so I ended up unplugging it altogether.
Can anyone give me some advice?