I'm having a bit of difficulty using google to find what I'm looking for, which is often the case in recent years. I'm curious to know how, in the old days, people made an instrument, and tuned it.

For example, if I built a piano, I now have 88 strings sounded by keys. Actually I need a rough idea of how long the strings need to be. I need to be able to find a frequency to base the tuning of all notes off of. I need to then somehow figure out how to make all 12 keys per octave an equal proportion apart in frequency, assuming I'm using the standard scale of today.

With no digital or precalibrated tools, how would I accomplish this? How could I count the frequency of each note, or what method would allow for the precise tuning of the first 12 keys, so that the rest of the notes can be tuned by ear an octave higher than the previous note?

For example, if I built a piano, I now have 88 strings sounded by keys. Actually I need a rough idea of how long the strings need to be. I need to be able to find a frequency to base the tuning of all notes off of. I need to then somehow figure out how to make all 12 keys per octave an equal proportion apart in frequency, assuming I'm using the standard scale of today.

With no digital or precalibrated tools, how would I accomplish this? How could I count the frequency of each note, or what method would allow for the precise tuning of the first 12 keys, so that the rest of the notes can be tuned by ear an octave higher than the previous note?

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