meantone

A short recording of a 1565 organ in Mantua tuned in quarter-comma meantone, showing split sharps in use. The extra keys provide separate D-sharp and A-flat for more tonalities.

Classical guitarist Brandon Acker shows how guitars with tied-on gut frets, as used 300 years ago, can play more in tune than modern fixed metal frets. He demonstrates microtonal and meantone tunings on a guitar with movable frets.