Thanks for your feedback. What should I use to "lubricate"? The next string change will come at some pointguitarrista wrote: ↑Wed Sep 06, 2017 9:21 amYes, if the friction at the nut is high enough, it might be that when you tune up to apparent pitch, the part o the string between the nut and the roller is under higher tension than the working part o the string (nut to saddle). As you move the string around while playing, that imbalance will equalize resulting in the apparent pitch going sharp. But the sharpening of pitch while warming up of nylon trebles is present regardless. Try to lubricate the nut and make sure the strings do not stick there in any way, see if the effect diminishes.
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