   Audio noise created over speakers for fullscreen apps.
  When I set my game to fullscreen I get an audible buzz over the speakers (there is currently no audio component in the game). The frequency of the sound seems to be tied to the framerate. I found something similar explained at http://msdn.microsoft.com/en-us/library/bb174608%28VS.85%29.aspx, but clamping the output hasn't had any effect on the sound.Anyone have any ideas on what might be causing this, or at least some better keywords for searching (searching anything I could think of with directx sound buzz fullscreen would just turn up results for direct sound or xact).   
  Could be a hardware issue with your PC, not anything to do with the software.Try testing on a few different types of PCs.I've seen PC's that have leaked 'noise' onto the audio line when rendering in certain refresh rates before (usually because of cheap on-board audio chips). I've also see lots of cases of 'noise' on the line-out being caused by input devices, such as when you scroll your mouse wheel!   ;  Does it happen with other fullscreen games? It could be interference from your graphics card or bus or something else.   ;  I've only noticed it on one or two other games and never to the extent that I hear it in mine, but I can try it on a few other computers tomorrow and see if they have the issue.   ;  the problem is coming from the location of your video card and your sound card. im assuming you have a pcie or agp video card? im also assuming you have a sound card in there too? if they are in neighboring slots, try moving the sound card to a slot further away from the video card. i had this same problem a few years ago. the problem is that certain pairs of slots can bleed noise across the bus. another option you can try (although im not sure it will make a difference) is to check and see if your speaker cables and your video cable are touching. if they are, just spread them apart. usually video cables and sound cables are shielding so i dont think this will make a difference. its worth a shot though.   