Hi Paul. My understanding is that at present most folks reading pianotech and caut subscribe to the idea that loose pins <<cause>> false beats in pianos. Which as far as I can determine by direct observation of the condition from several angles which isolate the condition in real pianos is simply not true. I'm also aware that many believe that false beats are caused by rust on strings, general termination problems, variations in string thickness and density... etc. etc. "I know of course this is at odds with the popular notion at present.... but the data in front of me is just plain to difficult to ignore." Ric: What, in your opinion, is the "popular notion at present..."---the "loose pin theory"? Paul
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