def ensure_melody(self, melody):
"""Ensure that the four-part harmony has a complete or partial melody as
its soprano line."""
for t, note in enumerate(melody):
if not note:
continue
constraint = self.notes[denote(note), 3, t] == 1
self.model.addConstr(constraint,
"melody_t" + str(t))
self.model.update()
# (Note: model is untested on anything other than default parameters)
max_pitch = 60
voice_count = 4
# What is the maximum semitone interval allowed between consecutive pitches in
# the same voice?
max_interval = 6
# What vocal ranges should each of the voices use?
voice_ranges = [
range(denote("g"), denote("d'")),
range(denote("c"), denote("g'")),
range(denote("g"), denote("d''")),
range(denote("c'"), denote("c'''"))
]
# Chord progression matrix (phi)
chord_progressions = {
# {"I", "I6", "I64", "ii", "ii6", "iii", "iii6", "IV", "IV6", "IV64", "V", "V6", "V64", "V7", "V75", "V43", "V2", "vi", "vi6", "vii6"},
"I": { "I6", "I64", "ii", "ii6", "iii", "iii6", "IV", "IV6", "IV64", "V", "V6", "V64", "V7", "V75", "V43", "V2", "vi", "vi6", "vii6"},
"I6": {"I", "I64", "ii", "ii6", "iii", "iii6", "IV", "IV6", "IV64", "V", "V6", "V64", "V7", "V75", "V43", "V2", "vi", "vi6", "vii6"},
"I64": { "V", "V7", },
"ii": { "ii6", "V", "V6", "V7", "V75", "V43", "V2", "vii6"},
"ii6": { "ii", "V", "V6", "V7", "V75", "V43", "V2", "vii6"},
