Hello All: I have a question about new strings and changing harmonicity, which may have been covered before. I retuned an upright that I restrung last year. The last time I tuned it I noted down the FAC numbers on the service record. I remeasured those numbers today, and they had all dropped an average of 2 cents. I wonder if others have noticed this happening, and if so, how much change they noticed and an explanation for this phenomenon. I hazard the guess that it has something to do with the stretching going on. This is the 8th tuning I gave the piano after restringing. The last time I tuned it was in September, when humidity was somewhat here up in the Sierra foothills. Thanks in advance. Patrick C. Poulson Registered Piano Technician Piano Technicians Guild
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