Hi @Kevin_Aston ,
there is nothing to be heard, because the ASIO driver does not “see” a port of the audio device, where it can send the audio stream to.
If you go to Edit > Device Setup and push the Control Panel button, a new little window opens. In the middle is a list with output ports, that one is empty with you.
Do you have other audio apps running in parallel to Dorico?
In the just mentioned Control Panel, at the top is some option about exclusive access; is that tick marked with you. If so, please toggle and see if output ports turn up?
There is also a Windows-side option for that, which I want you to check. Please have a look at my other posting. There the talk is about a different option, but you can also find the one about exclusive access in there as well. Again, try toggling and see if output ports do appear then.