Preparing AI music stems for a second opinion

While revisiting a draft I have been trying to understand a high, repeating texture in one generated track. It may be part of the arrangement, but it also sounds slightly mechanical when the mix gets quiet. I first noticed it on headphones, then checked the same section through small speakers and heard a softer version there too. That made me curious rather than certain. To keep it honest, I switch off extra limiting while comparing. After each pass, I write the exact moment for later listening. I opened a spectrogram and saw a small cluster of peaks near the moments that bothered me, although I know a picture alone cannot tell me whether the sound is a fault. fixsuno.top seemed useful as a plain reference while I worked out what to listen for next. I am trying to avoid treating every unusual detail as damage, because some of the best parts of generated music are unexpected. My next step is to compare a fresh export, then make notes on the exact timestamps before considering any repair. For those who use both ears and visual tools, what convinces you that a strange high-frequency detail is something to investigate? Is there a basic check that helps separate curiosity from over-editing?