I don't understand what you mean by "stream to a DLNA device direct from the NAS". So, what kind of device are you using? AKA what is actually hooked up to the pre-amp/receiver that you are controlling with DSAudio? I'm sorry for the dumb question, but I just don't get it.
I guess the easiest way is to show you a picture:
For the upstairs family room, i have a Pioneer SC1227. Downstairs in the rec room I have an apple TV box. Even my Panasonic Bluray player can be streamed to. Right now for my media room, my Marantz AV7005 is not hooked up, or that would be in the list too.
so for example, I could play to my apple TV downstairs a Cheep Trick song by simply selecting is from my web browser and click on the play. You can make up play lists, edit them, play multiple sources at once.
or for a different interface, here is the ipad version of the app