def spell(self):
major_root = self._notes[0].num() - scale_numbers[self._mode_num-1]
if major_root < 1:
major_root += 12
d = Note('F').distance(Note(major_root))
if d in range(3,6):
self._notes = [i.to_sharp() for i in self._notes]
elif d in range(9,12):
self._notes = [i.to_flat() for i in self._notes]
elif d in range(6,9):
if self._notes[0].acc() == 'f':
self._notes = [i.to_flat() for i in self._notes]
else:
self._notes = [i.to_sharp() for i in self._notes]
elif d in range(0,3):
for i in self._notes:
if i.num() == 1: # C
i.to_flat()
elif i.num() == 5: # E
i.to_sharp()
elif i.num() == 12: # B
i.to_sharp()
else:
raise ValueError('Unexpected transposition error in Scale.spell')
return self
def spell(self):
self.trspell()
if self._sev_type[0]:
base = sev_types[self._sev_type[0]][0]
d = Note(base).distance(self.root())
if d in range(1, 6):
respell = self._triad_type != self._sev_type[0] and self.root(
).acc() == 'f'
if d in range(3, 6) and respell:
self.root().to_sharp()
self.spell()
else:
self.seventh().to_sharp()
elif d in range(9, 12):
self.seventh().to_flat()
elif d in range(6, 9):
if self.root().acc() == 'f':
self.seventh().to_flat()
else:
self.seventh().to_sharp()
elif d == 0:
if base == 'F':
self.seventh().to_sharp()
else:
self.seventh().to_flat()
else:
raise ValueError(
f'Unexpected transposition error with d = {d}')
return
def __init__(self, root_name, mode=1):
self._mode_num = mode
self._mode = modes[self._mode_num-1]
root = Note(root_name)
self._root_name = root.name()
t = np.array(scale_numbers[self._mode_num-1:self._mode_num+6]) - scale_numbers[self._mode_num-1]
self._notes = [root.transpose(i.item()) for i in t]
self.spell()
return
def trspell(self):
base = triad_types[self._triad_type][0]
ignore_fifths = False
if base == 'd':
ignore_fifths = True
base = 'A'
d = Note(base).distance(self.root())
if d in range(1,5):
self.root().to_sharp()
self.third().to_sharp()
if not ignore_fifths:
self.fifth().to_sharp()
elif d in range(8,12):
self.root().to_flat()
self.third().to_flat()
if not ignore_fifths:
self.fifth().to_flat()
elif d in range(5,8):
if self.root().acc() == 'f':
self.root().to_flat()
self.third().to_flat()
if not ignore_fifths:
self.fifth().to_flat()
else:
self.root().to_sharp()
self.third().to_sharp()
if not ignore_fifths:
self.fifth().to_sharp()
elif d == 0:
if base == 'C':
self.root().to_flat()
self.third().to_sharp()
else:
self.third().to_flat()
if not ignore_fifths:
self.fifth().to_sharp()
else:
raise ValueError(f'Unexpected transposition error with d = {d}')
if ignore_fifths:
if d in range(5,8):
self.root().to_flat()
self.third().to_flat()
self.fifth().to_flat()
else:
self.fifth().to_flat()
return
def seventh(self, seventh=None):
if seventh:
self._seventh = Note(seventh)
return self._seventh
def fifth(self, fifth = None):
if fifth:
self._fifth = Note(fifth)
return self._fifth
def third(self, third = None):
if third:
self._third = Note(third)
return self._third
def root(self, root = None):
if root:
self._root = Note(root)
return self._root