Matthew van Eerde wrote: > > What version of Windows are you running on? > > > > See the chart here: > http://msdn.microsoft.com/en-us/library/windows/hardware/ff536251(v=vs.85).aspx > <http://msdn.microsoft.com/en-us/library/windows/hardware/ff536251%28v=vs.85%29.aspx> > That's the key reference point I was missing -- enormous thanks for that. I'm currently testing on Win 7, as is the client. I do advertise myself as a microphone, so the system is applying a +30dB boost. So, am I right in thinking I can solve my problem by supporting KSPROPERTY_AUDIO_VOLUMELEVEL? -- Tim Roberts, timr@xxxxxxxxx Providenza & Boekelheide, Inc.