[twobitshifter]

I think more resolution may give you more false negatives, which might not be helpful. We’ve used similar tools for integration testing at work and the smallest usually irrelevant change can bust the reference cases, due to the high-detail in the reference, which means going through all the changed tests and then seeing that everything is still fine.

For this, just thinking about sound, I wonder if you could invert the reference wave form and add it to the test to see how well it cancels? Then instead of just knowing there was a diff, you could get measurements of the degree of the diff.