No sound coming from computer

Thanks for your reply.

I like the look of the UR22. Can you confirm how this works? If I plug it in to a USB socket does it take over from the built in Realtek audio card? Should I connect my monitoring system directly to the UR22 line outputs or leave them connected to the computer jacks? I’m using the Halion Sonic SE and also Garritan Personal Orchestra VST instruments and I’m not sure how the sound from these will get to the monitor outputs.

Grateful for advice.