SB radio stuttering and interference

The radio is on community firmware 8.1 and LMS 8.2

Wifi signal symbol is white and has full bars.

I have un-checked the upnp and shairplay plugins as the logs say these are failing to connect, however I still have interference harsh noise. I don't think this affects the Touch but I don't want to risk my large speakers so can't test.

I can't attach the logs as I am on mobile phone. Will do this soon on pc.