Best pathway in Signal?

Hello Community! I have only recently started using Roon via Prime Computer with Rock Software. So far so good. I connected the core with USB 2.0 directly to my M dac audiolab. Unfortunately, I sometimes hear a quiet crackling like a disturbance, as is also known from records. Similar to a short static discharge. Has anyone ever had such a problem? And basically: should the core be connected directly to a DAC or be a Roon Ready Streamer in between? Could get a Moon Streamer. What do you think? And what would be better: Signal via Wi-Fi or cable? Thank you for your recommendation and HIlfe, LgMichael