Hello Chris.

There were no other tracks and no plugins involved as I was testing out the interface as simply as possible to see how it worked before beginning a project. Previously I'd recorded files to the H4 and imported them onto Cubase, which worked fine for what I was after at the time.

Interestingly I downloaded the H Series ASIO driver from Zoom and replaced my old ASIO driver. It is meant for Cubase LE4, but it seems to work! There is a warning that it may make Cubase LE unstable (whatever that means) but so far, after a very brief trial, it seems to do the trick.

Maybe I've solved the problem, but thanks for your help Chris. I'll post again if it all goes tits up! It usually does!

Chris