Hi, I suspect this may have been solved in various ways but here’s mine fwiw:
To get desktop audio on my phone I use Soundwire - very simple to set up and use, so get that working first. The free version suffices.
To get Cubase and Windows to share outputs I use VoiceMeeter as my main Windows audio driver, set to use “VoiceMeeter Input”. Set the Soundwire server to use “VoiceMeeter Output”
Now set Cubase to use ASIO4ALL. Create a Monitor output in Cubase’s Audio Connections (F4) and send them to the now-available “VM Aux out 1/2”. I couldn’t get it to work going direct to VoiceMeeter in Studio Setup.
Bingo! I’m now listening to my tune on the Bt speaker linked to my phone. In fact, because I also use the phone to listen to the radio through this speaker, I’m now listening to both at the same time. Handy, I suppose, if you’re writing background music!
Cheers,
C