What sort of details are you looking for? The redirection of the audio stream to the network is done within the audio service using software that is specific to desktop and application remoting and can't be repurposed outside of those scenarios. Windows XP used the NT4 audio driver model (a.k.a. winmm driver model, MME driver model, etc.). Frank Yerrace Microsoft Corporation This posting is provided "AS IS" with no warranties, and confers no rights. From: wdmaudiodev-bounce@xxxxxxxxxxxxx [mailto:wdmaudiodev-bounce@xxxxxxxxxxxxx] On Behalf Of Tim Newsham Sent: Wednesday, August 26, 2009 4:21 PM To: wdmaudiodev@xxxxxxxxxxxxx Subject: [wdmaudiodev] Re: audio driver questions On Wed, Aug 26, 2009 at 11:49 AM, Frank Yerrace <Frank.Yerrace@xxxxxxxxxxxxx<mailto:Frank.Yerrace@xxxxxxxxxxxxx>> wrote: Assuming you are referring to Windows Vista, Windows Server 2008, and later, the post-mix audio stream is directed to the network from within the audio service. The audio stream does not go to a kernel mode audio driver. Are the details of this redirection available somewhere? What about in older systems such as WinXP? Frank Yerrace Microsoft Corporation