Nommo Chromo + Leviathan on PC ?

I am really disappointed to find combining these two great audio products isn't very simple. I need some help, please. I am on Windows 10. Nomma is a USB sound device, while Leviathan is an AUX 3.5mm jack connection. In windows, you have to pick between one or the other. I have looked into bridging those connections in Device Settings, unfortunately, my soundcard doesn't seem to support that. Has anyone found a workaround? Also, why in the hell would Razer design two audio products that do not pair off one another? The subwoofer for the Leviathan is a perfect pairing with the Nomma. So bizarre to me they didn't design these products to work as a pair, with the soundbar as an addition. Thanks.