Richard, He is right. I got a lot of incredulous replies last time this came up so I just dropped it. I couldn't accurately describe what I do and I don't need to prove it to anyone either. I hear the difference between keys in equal temperament. I know all about tuning (being a tuner of course) and I can't really explain the what or why of it. Stan had it right. There are many forms, levels, and qualities of pitch memory. Andrew
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