Creates a phase composition in the style of 1970s minimalism, but bitonally.
The source code describes how this works.
>>> from music21 import *
>>> composition.phasing.pitchedPhase(cycles = 4, show = True)
generate the score of Arvo Pärt’s “Pari Intervallo” algorithmically using music21.scale.ConcreteScale() to simulate Tintinabulation.