Dear Fred: I forgot to mention to you that one of the examples which Virgil uses when he demonstrates the difference between a single string and all three strings of a unison is this. After he has tuned a unison, he will play a 10th below so you can hear the beat, and then he will place a rubber wedge between two strings and play the 10th again. His entire class agreed with him that the single string produced a beat that was higher in speed. He chided me a little when I objected that it still sounded the same to me. So, I proceeded to do my own experiments here. It was Sept. 9th when I was finally convinced. I Video taped my testing and the results. Frankly the kind of difference I measured at times was in the neighborhood of .3 to .4 cents. If I was careless in the unisons, it could be much worse so that is why I tuned each string so carefully within .1 cents. I was really trying to prove him wrong. Jim Coleman, Sr.
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