I was trying to help a friend out with a problem with a very annoying, loud buzzing sound that she gets with her DVD player. Here's her (decidedly low-tech) set-up: Toshiba SD2900 hooked up via composite cables through a modulator into the coaxial cable input on her TV (old TV with no composite inputs). My first reaction was "Buy a new cheap TV with real inputs!", but she really only uses this occasionally for movies and doesn't care to spend the less than $200 to get a new set. The buzzing sounds like interference; it is cyclical. Buzzes for about 5 seconds, then fades away for 3-4 seconds, then comes back. I played around with moving her player away from all the other components (TV and bookshelf stereo). No effect. The interference is definitely coming through the video cable though: unplugging both the L and R composite audio cables has no effect. Could it be interference through the actual wiring in her building? I didn't have the chance to move every thing around that much to check it. Aside from buying a new set with composite (or at least S-Video these days), is there anything else I can check to determine if it is related to the modulator or something else? BTW, it is definitely from the DVD player source since her VCR runs through the modulator and has no issues. I should mention that she does not notice this buzzing from all DVDs, or at least there are some disks that seem to not have this problem. Possibly related to disks that are encoded for surround? Then again, completely unplugging the L and R audio from he modulator does not make the buzzing go away. Sorry for rambling. Any ideas?!? Thanks!