'The Well-Tuned Keyboard(s)'
for Keyboard with alternating tunings.

'The Well-Tuned Keyboard(s)' is based upon the scale '1 - 17/16 - 9/8 - 19/16 - 5/4 - 21/16 - 11/8 - 3/2 - 13/8 - 27/16 - 7/4 - 15/16'.
The root of the scale changes permanently during the piece, so there are much more than twelve different pitches.