Separating a loop seam from audio texture

I am making a practice track for a dance class with spoken counts over generated instrumental backing. A buzzing texture appears during the opening bars, close to the first movement cue. The recording is intended for learning a sequence, with clear timing as the main requirement. I encountered remove suno artifacts while researching the buzz, and I want to evaluate any processing against that practical requirement. A reduction in buzzing might help, but I still need to establish whether the timing cues survive any processing. Would a complete phrase following the spoken counts provide a useful test at ordinary class volume? Holding the spoken layer fixed should make changes in the backing easier to judge. I would listen for softened attacks or a less obvious downbeat as well as any reduction in the buzz. Which timing change would make you reject a processed version even if its background sounded cleaner?