@waltercool see https://www.prosoundweb.com/the-great-pyramid-early-reflections-ancient-echoes/4/
"Being a musician myself, I was especially interested to discover a patterned musical signature to those resonances that formed an F-sharp chord. Ancient Egyptian texts indicate that this F-sharp was the resonant harmonic center of planet Earth. F-sharp is (coincidentally?) the tuning reference for the sacred flutes of many Native American shamans"
Not all my instruments have a complete chromatic scale, but at least you always have F# available, which is pretty curious