ok certain notes have 3 strings.
the rightmost string of a note loops around a peg and becomes the leftmost string of the next higher note.
so if you increase the tension on the first, you have to increase the tension on the adjacent. right?
well that's what i thought, but i've had 2 piano tuners tell me that this isn't so - that the tightening the rightmost string on a B does not affect the tension on the adjacent C's leftmost string - even if it is the same string.
they laugh at me saying that if it were so then it would be impossible to tune the piano.
i try to counter with the idea that the tuning can come from the length of the delimiters on the string and that may be the 'shared' string idea was done to actually speed up tuning - ie by tuning the rightmost string on the B, you automatically end up with the correct tension for the adjacent C's leftmost string (the delimiters end up giving you the correct pitch when the tension is correct).
i figured my understanding needs to be ratified or corrected so i bring my question here. besides, i don't want to be laughed at anymore.