[ramanan]

minutephysics had a nice video about the mathematics that go behind piano tuning too.

"Why It's Impossible to Tune a Piano" https://www.youtube.com/watch?v=1Hqm0dYKUx4

[kzrdude]

If you really want to dive deep into historical tuning systems, check out early music sources, https://m.youtube.com/channel/UCJOiqToQ7kiakqTLE7Hdd5g/video...