Yes, You're absolutely right sir. Kevin ----- Original Message ----- From: Jose Catena To: wdmaudiodev@xxxxxxxxxxxxx Sent: Friday, June 26, 2009 5:00 PM Subject: [wdmaudiodev] Re: How to filter microphone voice? Ø what did you mean "user mode audio I/O hook"? I mean that your app, as many others seen here before, would take much advantage of such a hook. But unfortunately, that hook does not exist, at least in a documented way. My post was just a reminder to MS about our needs in this regard, in the hope it’s considered in a future release. Jose Catena DIGIWAVES S.L.