It is absolutely neccessary to to a scan (or having a pre-build Channellist with valid data) to get building a graph succesfully !
Some codecs and other demuxer, splitter, renderer need a valid signal to combine pins bewtween each other.
Especially when parts of the graph are created automatically.
I dont know exactly how rel is doing this...
I am far behind this situation.
I have my Twinhan AD-SP 400 (1041) working fine with MyTheatre and I can't get it working it w/ DD.
I see that you report the 1041 as part of your equipment description.
It is working fine?
I tryed your driver (it is in my device driver list) but it didn't help.
A friend of mine has the same card and he had the same problem.
He got it working by lucky only after having installed and running MT.
It looks like MT set something properly for DD and made it work.
He got messed up with codecs and other things, reformatted his PC and he could not getting it running anymore.
He told me DD is better than MT and I'd like to give it a try.
Any help will be much appreciatted.