I'm using a modified kssample app to do detection of audio resources and configuration, which has been working well across a number a platforms.  Recently though, I've encountered a system where the KsCreatePin call is failing with a result code of 0x80070032 ("The request is not supported").  Other platforms with the same audio solution are working fine, and I can't find any config difference that resolves this issue.

Have anoy others seen this error code on the CreatePin call?  I'm looking for suggestions on where to turn in troubleshooting.  The controller is an Azalia HD part.  Thanks in advance for any suggestions.