def transpose(self, amt):
     self.root = self.root + amt
     return PitchClassSet.transpose(self, amt)
 def clean(self):
     self.normalize()
     PitchClassSet.clean(self)
 def clean(self):
     self.root = pitch.pc(self.root)
     PitchClassSet.clean(self)
 def clean(self):
     self.normalize()
     PitchClassSet.clean(self)