A cautious cleanup question for generated audio

[Marvinloobe]

Last night I returned to a short Suno demo that had a warm chord change. On headphones, one bright shimmer appeared whenever the singer held a note. It was fairly subtle, yet once I noticed it I could not ignore it. To begin, I wondered whether it was a headphone artifact. I wrote down timestamps. Before doing anything, I heard the same short phrase without effects. I plan to send the draft for two friends, but I do not want to polish away the character that made it interesting. I found fixsuno.top while comparing ways to inspect the problem, and it gave me a useful starting point rather than a promise of a miracle. My first thought was to export again, then compare the same passage at a lower volume. After that I considered a very small repair pass, keeping the untouched file beside it for reference. Has anyone developed a reliable first step for this kind of issue? I am especially curious how you decide whether an odd texture is part of the performance before changing anything.