piCorePlayer and Topping MX3

Hi,

I've been using piCorePlayer for some years, just got a Topping MX3 - update from earlier Topping model and can't get it to play (yes it is in USB mode!). I've tried every output option going for squeezelite, some of them appear to work from the logs but I don't get any sound. I have updated piCorePlayer to 6.1 today.

Any clues much appreciated.

thanks
Paul