Thanks for the message Alex.
One issue left to be able to get the audio signal from the external input on Virus responding in Cubase...Help appreciated again please.
Alex a follow up with 3outputs/0 inputs I am now getting the USB audio for USB1... fantastic...you have made it very clear.
Thank you thank you much appreciated
My error was not realising the output/input assignment as USB exclusively and treating it as a generic output/input option. That I believe is the root of my misunderstaning I was having porblems on understanding why sidechaining was even being mentioned but this s/c is a cubase issue with VST2s.
M