well.. after jumping thru so many hoops trying to get sound out of standalone, ive finally got it working, input and output were showing but no sound in standalone but sound as a plugin, the latest install of focusrite control and a restart and ive finally got sound in standalone, weirdly i did have sound in standalone before but the latest amplitube 5 update actually took it away from me! but now its back, try this option if you have amplitube 5 and a focusrite interface!
best luck!
Rob