From the first post in the series: > We now use the so called equal temperament system... Unless I'm playing a piano, no, I don't. And since I have an electric piano, I have been known to set it to meantone, but I accept that I'm a freak. Even on a guitar you have a fair amount of variation in pitch based on pressure and position of the left hand fingers relative to the fret. Not as much as on old instruments with gu…
Of course it's not going to be perfect, but it's still closer to 12TET-with-noise than some specific mediaeval tuning.