List, "Even the unison strings of a piano sound better when de-tuned to a minute degree (app. 2 cents total spread, corresponding to 2/3 beat per second @ a440). Fortunately a good piano tuner attempting to achieve true unison gets, on the average, a similar result" Dr Daniel W. Martin H D Baldwin Co Tech Jo. April 1964 This interested me greatly because I had always considered my unisons to be beatless, when they were right - if you know what I mean. However, when one talks to an organ tuner he will say that he can wait 20-30 seconds or more for a beat! This leads me to believe that there is truth in the above. Any thoughts greatly appreciated Rob Thornton UK
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