@1markr oh yes, I spent many an hour tweaking with iZotope - often diligently following the precision guidance of others, or just experimenting. I eventually moved away from upsampling, as I have done also with Roon. One major plus of Roon is the ability to toggle so easily between settings, or turning upsampling on or off on the fly. It makes it so much easier to find the settings that really work with your equipment.