Dorico audio output
To change Dorico audio output to another out device be it a dock, wired or wireless headphones, firstly connect the device to your surface.
Then start Dorico
Then go to Edit > device Setup
Then "Device control panel"
From this window, you then select the audio output
Hit ok then close.
Notes
it is possible to change the output at any point by following these instructions
It is also possible to change the output of the surface to another device e.g., speakers which all other programs will output their sound too however I do not suggest this as it adds in latency. This is why it disable them for the selected out it is using.