@pompeyjazz - what a kind gesture John, I used to use a scarlett, but I didn't like the complicated software that came with it, I use a behringer 1820, I like some of the additional features, like digital out, mute, monitoring, two headphone sockets etc. Let me know how you get on with the 4th gen box, and if you notice any improvements, make use of any of the features, like the Air mode.