Can those keyboards send audio through USB?
In my set up, Cubase 9, Virus TI and 2x Presonus Firestudio, with the Firestudios set as the audio device, not the Virus, the Virus still sends audio into Cubase via it’s USB. It acts like a VST. I’m not sure other keyboards can do this, it’s the ‘TI’ part
The Virus also sends midi from itself through the USB. The midi in/out ports on the Virus become like an extra separate midi hub that are connected to the PC via the TI’s USB cable, giving the set up essential extra ports.
I have all my other hardware connected via the 2 Firestudios, set up as devices with in Cubase. It can get quite complicated and why I’m still a dedicated Cubase user. When you start delving into those menus, you can see it’s an old part of the software they are still supporting.
Everything now works in sync and real time, including being able to place vst’s, Compression, EQ, on my hardware (Nord Rack2, KStation Rack and Novation stations) running through the project as simple as clicking open a vst. It’s really clever how it works, no need to keep bouncing the audio or setting up complicated busses, in out configs in each project.