Hello,
I’m pretty much lost on this. I can’t find any reference or even brief mention of it on MSDN (PortClass, WaveRT) or the sample drivers (ac97) - the only sample that implements something like it (SYSVAD) uses win8-specific event functions (and also uses a virtual audio device with WaveRT, to make things interesting), and since this has been available (and implemented) at least (somewhat) since vista, I imagine this isn’t it.
Many thanks in advance for any information regarding this, and sorry if it’s somewhere in plain sight - I’ve been lurking for a few days on this and can’t find anything.
Alex