I've read various articles about how the concept of tuning developed in the 17th, 18th century. But I wonder who decided that 'C' is 'C'? I assume that the first organs were the first instruments with repeatable fixed pitches, right?
Even though they may have been lower than today, the pitches were still in the same ballpark. So... who/how did they decide the vague idea of 'A' or 'C' when they were creating the original keyboards?
Does it have something to do with the original 4' or 8' pipes?
TIA