I read Kent Swafford's article in the March Journal about the "Tunic OnlyPure" ETD with great interest. Kent said inventor "has stated his intention to withhold most explanations of how all this works", and their web site says very little other than what the article said. Kent writes that the inventor claims it "deals with inharmonicity in a new way that is automatic". It seems magical to me that any device could just start tuning a note without having previously recorded data about the inharmonicity of other notes. How does it "know" where to place a treble pitch, without inharmonicity data from lower strings? Kent said it did a great job, but it can't really be magic, so, I'm just wondering if anyone has any general speculation about how it works. (Gosh, I was just beginning to think I had some idea of how regular ETD's work, now this comes along!) Thanks David B. Stang Columbus Ohio
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