I remember hearing a songwriter being interviewed on a talk show a few decades ago and giving examples of how he does his job. He was demonstrating on a guitar and said something like "And now I switch to this chord for the first time. The listener can't really tell unless they have perfect pitch but that doesn't matter. They're affected by it anyway".
I can't tell the difference in 212ppi and 300ppi and I'm not aware of being affected by it but I wouldn't be surprised to find out that I was in some subliminal way.
Or maybe not. It's hard to really know.
Barry
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