Hi All, We have a audio driver based on Wavecyclic driver model. According to following link: http://msdn.microsoft.com/en-us/library/windows/hardware/ff537528(v=vs<http://msdn.microsoft.com/en-us/library/windows/hardware/ff537528%28v=vs.85%29.aspx> .85).aspx "You cannot obtain a logo qualification for a WaveCyclic- or a WavePci -based audio driver" So is it not possible for us to get windows logo signature for our driver? I am a little doubtful because I see some postings on this list where people have written their driver using wavecyclic and they are running DTM tests for WHQL testing. Thanks, Neetu