Yes, the APO vendor is still beholden to the driver vendor as of Windows 8.1; in particular the APO binaries are still certified *en bloc* with the audio driver .inf. ________________________________ From: Robert Bielik<mailto:robert.bielik@xxxxxxxx> Sent: 8/13/2014 11:52 PM To: wdmaudiodev@xxxxxxxxxxxxx<mailto:wdmaudiodev@xxxxxxxxxxxxx> Subject: [wdmaudiodev] Re: Device neutral GFX, the sequel Tim Roberts skrev 2014-08-14 08:44: >> I wonder now if there has been any change in policy, if this can now be done >> with a "blessing" from Microsoft ? :) > > There has been no change. There are now several additional types of APO, but > they are all considered to be an extension of the hardware. > Thanks Tim, I kind of figured you'd chip in and say that :) I mean, the rationale for this not to be allowed is fair, but the business opportunities allowing this (restricted by only allowing WHQL signed APOs f.i.) are huge. And Frank did say "I ask because it's good for us (MS) to be aware of how people are trying to add value to the Windows audio system so we can consider it in future changes." So I'd rather hear it from the "horses mouth" ;) Regards /R ****************** WDMAUDIODEV addresses: Post message: mailto:wdmaudiodev@xxxxxxxxxxxxx Subscribe: mailto:wdmaudiodev-request@xxxxxxxxxxxxx?subject=subscribe Unsubscribe: mailto:wdmaudiodev-request@xxxxxxxxxxxxx?subject=unsubscribe Moderator: mailto:wdmaudiodev-moderators@xxxxxxxxxxxxx URL to WDMAUDIODEV page: http://www.wdmaudiodev.com/