Report Any docs on av.exe and other programs? in Hacks/Mods Posted April 14, 2010 OK, fair enough. Next question: Does anyone know, and have a few minutes to tell me, how switching audio sources is done? Is there a (known) command already on the system to do it, as I suspect, or is it done at a lower level by the programs themselves? Aside from av.exe being the prime suspect where you'd find the use of the API calls, I would investigate the code inside NDeviceLib.DLL, where you'll see such tasty strings as: NPuComRcvSelectorChangeEvent NPuComSelectorChg NPuComRcvSourceEnableEvent I'm not sure if those are structure names or API functions, but either way I'd say it's worth going at it with WinHex or IdaPro.