Problem with KEF X300A

I’ve been using my KEF 300A speakers connected directly via USB to my 2013 iMac for several years. I’ve just upgraded to a Mac Studio. Now, when I listen to them connected the same way to my new Mac, there’s a terrible crackling in the background. This is not Roon-specific but I’m hoping someone on this forum may have had and solved this problem. I’d appreciate any advice you can offer. Thanks.