Hi Gerico and welcome to the forum. I tried looking up Virtual Drum X and didn't find much.

Is it a drum synth or a hardware controller or what? If all you want to do is play along with Biab tracks then you don't need to do anything inside Biab except mute the drum track. You run Drum X by itself and wail away along with Biab. If you want to integrate it within Biab and record your own drum parts on the drum track that's completely different. Biab works with DXi and VSTi plugins. From what I can see Drum X is not a plugin but check that and let us know.

Bob

Biab/RB latest build, Win 11 Pro, Ryzen 5 5600 G, 512 Gig SSD, 16 Gigs Ram, Steinberg UR22 MkII, Roland Sonic Cell, Kurzweil PC3, Hammond SK1, Korg PA3XPro, Garritan JABB, Hypercanvas, Sampletank 3, more.