No sound from Oxygen 88

Why am I getting no sound output when I try to use Halion 4.5 (all current updates installed) as a standalone app with my Oxygen88 midi keyboard as the input? This setup works fine using the keyboard through Cubase 7 (again all updates installed).

Audio outputs are set the same in both cases and I can see that the keyboard input is being recognised but there is no output. Am I missing something obvious? I confess that I find midi a bit of a black art at the best of times.

Any help/advice welcome :blush:

HALion 4 Guide.gif
Hopefully this GIF guide will help you…