Thanks Tobias, I've tried those two steps but my test machine gives error messages which make no sense to me. I will post them when I'm back at that computer. Børge On Wed, Feb 5, 2014 at 9:29 AM, Tobias Erichsen <erichsen@xxxxxxxxxxxxx> wrote: > I would start taking hints from other devices inf-files and then try > to make sense of them by looking at the documentation: > > http://msdn.microsoft.com/en-us/library/windows/hardware/ff549520(v=vs.85).aspx > > ChkInf in the tools directory of the WDK gives some good feedback about > possible errors in your inf-file... > > Tobias > ****************** 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/