is there a mathematical relationship between humidity/temperature/frequency and string diameter that one can use to retune gut strings predictively ,as a process of successive approximation? for instance, I played in two different locations on two consecutive nights. The first night was awful and I spent a good 15 minutes retuning in between pieces, despite having retuned at the start of the evening when the hall was 'full'. I retuned the strings when I got home but noted the degree of 'out-of-tuneness in cents' on the meter - for each of the gut strings. The next night, I reset those gut strings by 50% of the displacement (approx 10cents) before entering the hall and then checked the tuning about 30 minutes later. The tuning was almost 'spot - on' and was very easy to fine-tune. I have only done this on one occasion so I don't know whether this is reasonable approach or not. BTW, the humidity in this area is high and didn't change very much. I would be interested to hear how experienced 'gut-players' approach the tuning problem. regards Charles
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