I noticed a very faint scratchy sound coming out of my speakers in a soft passage of music. This was quite annoying, so I muted playback and turned up the sound. At "Max" the scratchy sound was quite annoying, and proceeded, to isolate the problem, removing antennae, switching speakers, etc. It appears to be associated with the V1, V2, V3, and DVD inputs-- in other words, those associated with a component, s/video, or composite input. At present, I don't use the video switching capability-- the onkyo doesn't switch RGB . Is there a way of removing this noise, without teaching other household members that "the sonica is connected to the "MiniDisc input", and the HDTV is connected to the "CD input"?