def add_midi_score(self):
"""Transform a scale degree sequence into a midi pitch sequence"""
fifth_degree_pitch = 7 + self.tonics[self.tonic]
while fifth_degree_pitch < 45:
fifth_degree_pitch += 12
start_index = Voice.all_midi_pitches.index(fifth_degree_pitch)
self.melody_range = Voice.all_midi_pitches[start_index:start_index +
11]
self.logger.warning(f"Melody range: {self.melody_range}")
self.unit_length = sum(self.finalized_rhythms[0])
if self.time_sig in {(4, 3), (4, 2)}:
chord_quarter_length = self.measure_length // 2
else:
chord_quarter_length = self.measure_length
self.logger.warning(f"Unit length: {self.unit_length}")
self.logger.warning(f"Chord quarter length: {chord_quarter_length}")
Voice.max_note_duration = 960 * chord_quarter_length
if Voice.pickup:
index_shift = self.add_pickup_notes()
else:
index_shift = 0
self.current_time = Voice.pickup_duration
print(f"Break melody: {self.break_notes}")
self.nested_scale_degrees.pop()
self.add_midi_section(self.nested_scale_degrees, 0, {}, index_shift)
self.unnested_scale_degrees.pop()
if not self.repeat_ending:
self.midi_notes.append(
Voice.Note("Rest", self.current_time, Voice.max_note_duration))
self.current_time += Voice.max_note_duration
return
second_pickup_fraction = Fraction(numerator=sum(
self.finalized_rhythms[-5][1:]),
denominator=self.unit_length)
second_pickup_duration = int(Voice.max_note_duration *
second_pickup_fraction)
ending_duration = Voice.max_note_duration - second_pickup_duration
self.midi_notes.append(
Voice.Note("Rest", self.current_time, ending_duration))
self.current_time += ending_duration
remaining_melody = self.nested_scale_degrees[-4:]
remaining_melody[0] = remaining_melody[0][1:]
end_notes_num = self.add_midi_section(remaining_melody, -5, {-5: 1})
self.unnested_scale_degrees.extend(
self.unnested_scale_degrees[-end_notes_num:])
self.midi_notes.append(
Voice.Note("Rest", self.current_time, Voice.max_note_duration))
self.current_time += Voice.max_note_duration
def set_melodic_figures(nested_scale_degrees):
chosen_figurations = []
melodic_figures = {
(2, (1, )): "IPT",
(0, (2, 1)): "DCN",
(2, (-1, 1)): "OPT",
(0, (-1, )): "CN",
(1, (-1, )): "PIN",
(1, (2, )): "CIN",
(1, (-2, -1)): "OPT",
(4, (2, )): "IPT",
(3, (4, )): "CIN",
(3, (1, )): "IPT",
(1, (0, )): "RET",
(2, (2, )): "ANT",
(3, (2, )): "IPT",
(3, (1, 3)): "ANT",
(2, (2, 3)): "OPT",
(4, (1, 2)): "IPT",
(1, (-2, )): "OPT",
(1, (-1, 0)): "OPT",
(3, (1, 2)): "IPT",
(5, (3, )): "5PT",
(0, (1, )): "CN",
(1, (1, )): "ANT"
}
chord_index = 0
for previous_melody_group, current_melody_group in zip(
nested_scale_degrees, nested_scale_degrees[1:]):
chord_index += 1
figure_group = []
main_pitch_diff = current_melody_group[0] - previous_melody_group[0]
main_pitch_direction = Voice.calculate_slope(main_pitch_diff)
main_pitch_diff = abs(main_pitch_diff)
embellish_degrees = previous_melody_group[1:]
if not embellish_degrees:
chosen_figurations.append(None)
continue
for previous_melody_note in embellish_degrees:
pitch_diff = previous_melody_note - previous_melody_group[0]
pitch_direction = Voice.calculate_slope(pitch_diff)
if pitch_direction == 0:
reference_direction = 0
if 0 != main_pitch_direction == pitch_direction:
reference_direction = 1 * abs(pitch_diff)
elif 0 != main_pitch_direction != pitch_direction:
reference_direction = -1 * abs(pitch_diff)
elif main_pitch_direction == 0:
reference_direction = pitch_diff
figure_group.append(reference_direction)
figure_group = tuple(figure_group)
if chord_index == 8:
modifier = "PICK_"
else:
modifier = ""
chosen_figurations.append(modifier + melodic_figures[(main_pitch_diff,
figure_group)])
print(chosen_figurations)
return chosen_figurations
def add_chord_section(self, start_index, end_index, all_note_durations,
all_voices_used, chord_units_used):
"""Extend accompaniment with selected chords"""
unique_chord_iter = iter(self.chosen_chord_voicings)
chord_sequence = Voice.chord_sequence[:end_index]
for chord_index, current_chord_obj in enumerate(chord_sequence):
if chord_index < start_index:
if chord_index in self.unique_chord_indices:
current_pitch_combo = next(unique_chord_iter)
last_pitch_combo = current_pitch_combo
continue
pitches_to_degrees = current_chord_obj.pitches_to_degrees
note_durations = all_note_durations[chord_index % chord_units_used]
voices_used = all_voices_used[chord_index % chord_units_used]
if chord_index in self.unique_chord_indices:
current_pitch_combo = next(unique_chord_iter)
last_pitch_combo = current_pitch_combo
for voice_index, current_pitch in enumerate(
current_pitch_combo):
note_time = self.current_time
for beat_index, note_duration in enumerate(note_durations):
if voice_index in voices_used[beat_index]:
Voice.midi_score[voice_index + 1].append(
Voice.Note(current_pitch, note_time,
note_duration))
Voice.chorale_scale_degrees[voice_index].append(
pitches_to_degrees[current_pitch])
else:
Voice.midi_score[voice_index + 1].append(
Voice.Note("Rest", note_time, note_duration))
Voice.chorale_scale_degrees[voice_index].append(
None)
note_time += note_duration
else:
for voice_index, last_pitch in enumerate(last_pitch_combo):
note_time = self.current_time
for beat_index, note_duration in enumerate(note_durations):
if voice_index in voices_used[beat_index]:
Voice.midi_score[voice_index + 1].append(
Voice.Note(last_pitch, note_time,
note_duration))
Voice.chorale_scale_degrees[voice_index].append(
pitches_to_degrees[last_pitch])
else:
Voice.midi_score[voice_index + 1].append(
Voice.Note("Rest", note_time, note_duration))
Voice.chorale_scale_degrees[voice_index].append(
None)
note_time += note_duration
self.current_time += Voice.max_note_duration
def test_unnested_climaxes(obj):
section1 = Voice.merge_lists(*obj.nested_scale_degrees[:4])
section2 = Voice.merge_lists(*obj.nested_scale_degrees[4:8])
section3 = Voice.merge_lists(*obj.nested_scale_degrees[8:12])
section4 = Voice.merge_lists(*obj.nested_scale_degrees[12:])
if max(section1) == max(section2):
return False
if max(section3) <= max(section4):
return False
return True
def test_turns(self): self.assertEqual(Voice.get_turns([]), 0) self.assertEqual(Voice.get_turns([1]), 0) self.assertEqual(Voice.get_turns([3, 3, 3, 3, 3]), 0) self.assertEqual(Voice.get_turns([5, 5, 5, 5, 6]), 1) self.assertEqual(Voice.get_turns([6, 6, 6, 6, 5]), 1) self.assertEqual(Voice.get_turns([2, 3, 4]), 1) self.assertEqual(Voice.get_turns([5, 6, 5, 4]), 2) self.assertEqual(Voice.get_turns([2, 3, 3, 2, 1, 2]), 3)
def test_motifs(self): self.assertFalse(Voice.has_cross_duplicates([])) self.assertFalse(Voice.has_cross_duplicates([0, 0, 0, 0, 0])) self.assertFalse(Voice.has_cross_duplicates([1, 2, 3, 4, 5, 6, 7])) self.assertFalse(Voice.has_cross_duplicates([1, 2, 2, 3, 2, 1, 1])) self.assertTrue(Voice.has_cross_duplicates([2, 4, 2, 4, 1, 2, 3])) self.assertTrue(Voice.has_cross_duplicates([2, 2, 4, 4, 2, 4, 1, 2])) self.assertTrue(Voice.has_cross_duplicates([1, 5, 5, 5, 1, 1, 5]))
def test_bounds(obj):
if min(obj.unnested_scale_degrees) < -3:
return False
if max(obj.unnested_scale_degrees) > 7:
return False
if max(obj.unnested_scale_degrees) < 5:
return False
section1 = Voice.merge_lists(*obj.nested_scale_degrees[:3])
if min(section1) < 0:
return False
return True
def has_melody_figure(self):
"""Check specific melody against figuration options"""
last_rhythm_symbol = self.rhythm_symbols[self.chord_index - 1]
if last_rhythm_symbol == -1:
if self.chord_index == 15:
section3 = Voice.merge_lists(*self.nested_scale_degrees[8:12])
section4 = Voice.merge_lists(*self.nested_scale_degrees[12:14])
if max(section3) <= max(section4):
return False
self.nested_scale_degrees[self.chord_index -
1] = [self.previous_degree_choice]
return True
if last_rhythm_symbol == -2:
self.melody_figure_options[self.chord_index -
1] = (self.get_pickup_sequences(
self.current_degree_choice))
return self.add_valid_figure()
remaining_figures = self.melody_figure_options[self.chord_index - 1]
if remaining_figures:
return self.add_valid_figure()
degree_mvmt = self.current_degree_choice - self.previous_degree_choice
melody_slope = Voice.calculate_slope(degree_mvmt)
degree_mvmt = abs(degree_mvmt)
embellish_amount = len(self.finalized_rhythms[self.chord_index - 1])
if embellish_amount == 2:
all_figurations = self.all_single_figurations
elif embellish_amount == 3:
all_figurations = self.all_double_figurations
possible_scale_degrees = all_figurations[degree_mvmt](
self.previous_degree_choice, self.current_degree_choice,
melody_slope)
self.melody_figure_options[self.chord_index -
1] = possible_scale_degrees
return self.add_valid_figure()
def add_valid_figure(self):
"""Find and add specific figuration of base melody using idioms"""
valid_figure = None
remaining_figures = self.melody_figure_options[self.chord_index - 1]
random.shuffle(remaining_figures)
# alias has side effect but allows easier referencing
while remaining_figures:
inbetween, fig_type = remaining_figures.pop()
if min(inbetween) < -3 or max(inbetween) > 7:
continue
if self.chord_index - 1 < 3 and min(inbetween) < 0:
continue
unnested_scalar_melody = self.unnested_scale_degrees[:]
unnested_scalar_melody.extend(inbetween)
"""
chord 8 and 12 are short-circuited
only need to evaluate once going forward
so, use the next indices for testing at divisible checkpoints
"""
if self.chord_index == 13 and max(unnested_scalar_melody) < 5:
continue
if self.chord_index == 9:
section1 = Voice.merge_lists(*self.nested_scale_degrees[:4])
section2 = Voice.merge_lists(*self.nested_scale_degrees[4:8])
if max(section1) == max(section2):
continue
valid_figure = inbetween
break
if valid_figure is None:
return False
self.nested_scale_degrees[self.chord_index - 1] = [
self.previous_degree_choice, *valid_figure
]
self.chosen_figurations[self.chord_index - 1] = fig_type
return True
def add_pickup_notes(self):
"""Adds pickup notes to beginning of the piece"""
rest_rhythm = self.finalized_rhythms[7][0]
Voice.pickup_duration = Voice.max_note_duration
first_scale_degree = self.unnested_scale_degrees[0]
note_alterations = {}
rest_fraction = Fraction(numerator=rest_rhythm,
denominator=self.unit_length)
rest_duration = int(Voice.pickup_duration * rest_fraction)
self.midi_notes.append(Voice.Note("Rest", 0, rest_duration))
self.chord_index = 0
pickup_degree_sequence, _ = random.choice(
self.get_pickup_sequences(first_scale_degree))
current_time = rest_duration
unnested_scale_degrees = []
for note_index, note_rhythm in enumerate(self.pickup_rhythm):
pickup_scale_degree = pickup_degree_sequence[note_index]
note_offset = note_alterations.get(pickup_scale_degree % 7, 0)
midi_pitch = self.melody_range[pickup_scale_degree +
3] + note_offset
embellish_fraction = Fraction(numerator=note_rhythm,
denominator=self.unit_length)
note_duration = int(Voice.pickup_duration * embellish_fraction)
self.midi_notes.append(
Voice.Note(midi_pitch, current_time, note_duration))
unnested_scale_degrees.append(pickup_scale_degree)
current_time += note_duration
unnested_scale_degrees.extend(self.unnested_scale_degrees)
self.unnested_scale_degrees = unnested_scale_degrees
return len(self.pickup_rhythm)
def test_list_merger(self): self.assertEqual(Voice.merge_lists([]), []) self.assertEqual(Voice.merge_lists([], [], []), []) self.assertEqual(Voice.merge_lists([], [0], []), [0]) self.assertEqual(Voice.merge_lists([5], [], []), [5]) self.assertEqual(Voice.merge_lists([], [], [2, 3]), [2, 3]) self.assertEqual(Voice.merge_lists([4], [], [9, 1, 3], []), [4, 9, 1, 3]) self.assertEqual(Voice.merge_lists([1, 2], [3], [4, 5]), [1, 2, 3, 4, 5]) list1 = [-5, -4] list2 = [-3, -2] list3 = Voice.merge_lists(list1, list2) list3.append(0) self.assertFalse(list1[-1] == 0) self.assertFalse(list2[-1] == 0) list4 = Voice.merge_lists(list1, []) self.assertTrue(list1 is not list4)
def test_partition(self):
simple_durations = Voice.simple_beat_durations
compound_durations = Voice.compound_beat_durations
self.assertEqual(Voice.partition_rhythm(simple_durations, 0), [])
self.assertEqual(Voice.partition_rhythm(simple_durations, 4), [4])
self.assertEqual(Voice.partition_rhythm(simple_durations, 1.5), [1.5])
self.assertEqual(Voice.partition_rhythm(compound_durations, 2), [2])
self.assertEqual(
Voice.partition_rhythm(compound_durations, Fraction("2/3")),
[Fraction("2/3")])
self.assertEqual(
Voice.partition_rhythm(compound_durations, Fraction("5/6")),
[Fraction("2/3"), Fraction("1/6")])
self.assertEqual(
Voice.partition_rhythm(compound_durations, Fraction("5/3")),
[Fraction("4/3"), Fraction("1/3")])
self.assertEqual(
Voice.partition_rhythm(compound_durations, Fraction("10/3")),
[Fraction("8/3"), Fraction("2/3")])
def test_proper_leaps(obj):
# breaking this rule is too advanced for you
unnested_antecedent = Voice.merge_lists(*obj.nested_scale_degrees[:8])
unnested_consequent = Voice.merge_lists(*obj.nested_scale_degrees[8:])
proper_antecedent_leaps = Voice.has_proper_leaps(unnested_antecedent)
proper_consequent_leaps = Voice.has_proper_leaps(unnested_consequent)
if not (proper_antecedent_leaps and proper_consequent_leaps):
return False
ante_cons_transition = Voice.merge_lists(*obj.nested_scale_degrees[5:10])
if (not Voice.has_proper_leaps(ante_cons_transition)
and obj.nested_scale_degrees[0] != obj.nested_scale_degrees[8]):
return False
return True
def set_melodic_figures(nested_scale_degrees):
"""Defines figurations found in actual music"""
chosen_figurations = []
"""
IPT = inner passing tone
OPT = outer passing tone
ANT = anticipation
RET = retardation
CIN = current incomplete neighbor
PIN = previous incomplete neighbor
DN = double neighbor
CN = complete neighbor
DCN = double complete neighbor
Format of keys: (degree difference between base notes, (figurations))
"""
melodic_figures = {
(2, (1, )): "IPT",
(0, (2, 1)): "DCN",
(2, (-1, 1)): "OPT",
(0, (-1, )): "CN",
(1, (-1, )): "PIN",
(1, (2, )): "CIN",
(1, (-2, -1)): "OPT",
(4, (2, )): "IPT",
(3, (4, )): "CIN",
(3, (1, )): "IPT",
(1, (0, )): "RET",
(2, (2, )): "ANT",
(3, (2, )): "IPT",
(3, (1, 3)): "ANT",
(2, (2, 3)): "OPT",
(4, (1, 2)): "IPT",
(1, (-2, )): "OPT",
(1, (-1, 0)): "OPT",
(3, (1, 2)): "IPT",
(5, (3, )): "5PT",
(0, (1, )): "CN",
(1, (1, )): "ANT"
}
chord_index = 0
for previous_melody_group, current_melody_group in zip(
nested_scale_degrees, nested_scale_degrees[1:]):
chord_index += 1
figure_group = []
main_pitch_diff = current_melody_group[0] - previous_melody_group[0]
main_pitch_direction = Voice.calculate_slope(main_pitch_diff)
main_pitch_diff = abs(main_pitch_diff)
embellish_degrees = previous_melody_group[1:]
if not embellish_degrees:
chosen_figurations.append(None)
continue
for previous_melody_note in embellish_degrees:
pitch_diff = previous_melody_note - previous_melody_group[0]
pitch_direction = Voice.calculate_slope(pitch_diff)
if pitch_direction == 0:
reference_direction = 0
if 0 != main_pitch_direction == pitch_direction:
reference_direction = 1 * abs(pitch_diff)
elif 0 != main_pitch_direction != pitch_direction:
reference_direction = -1 * abs(pitch_diff)
elif main_pitch_direction == 0:
reference_direction = pitch_diff
figure_group.append(reference_direction)
figure_group = tuple(figure_group)
if chord_index == 8:
modifier = "PICK_"
else:
modifier = ""
chosen_figurations.append(modifier + melodic_figures[(main_pitch_diff,
figure_group)])
print(chosen_figurations)
return chosen_figurations
def test_slopes(self): self.assertEqual(Voice.calculate_slope(0), 0) self.assertEqual(Voice.calculate_slope(1), 1) self.assertEqual(Voice.calculate_slope(-1), -1) self.assertEqual(Voice.calculate_slope(5), 1) self.assertEqual(Voice.calculate_slope(-3), -1)
def test_leaps(self): self.assertFalse(Voice.has_proper_leaps([7, 6, 2, 1])) self.assertFalse(Voice.has_proper_leaps([0, 5, 6, 5])) self.assertFalse(Voice.has_proper_leaps([2, 6, 2, 3])) self.assertFalse(Voice.has_proper_leaps([4, 0, 5, 1])) self.assertFalse(Voice.has_proper_leaps([0, 5, 10, 9])) self.assertFalse(Voice.has_proper_leaps([9, 5, 0, 1])) self.assertFalse(Voice.has_proper_leaps([6, 7, 2, 2, 1])) self.assertFalse(Voice.has_proper_leaps([0, 5, 5, 5, 6])) self.assertTrue(Voice.has_proper_leaps([1, 4, 4, 3, 2])) self.assertTrue(Voice.has_proper_leaps([10, 6, 6, 7, 6])) self.assertTrue(Voice.has_proper_leaps([])) self.assertTrue(Voice.has_proper_leaps([1, 2, 3, 4])) self.assertTrue(Voice.has_proper_leaps([0, 5, 4, 3])) self.assertTrue(Voice.has_proper_leaps([5, 2, 3, 1])) self.assertTrue(Voice.has_proper_leaps([8, 6, 4, 2])) self.assertTrue(Voice.has_proper_leaps([1, 3, 5, 7]))
def add_midi_section(self,
melody_section,
chord_start_index,
note_start_indices,
index_shift=None):
"""Add midi notes to the pitch sequence using scale degrees"""
object_index = 0
melodic_minor = False
add_rest = False
melody_section_iter = iter(melody_section)
next_scale_group = next(melody_section_iter, None)
for chord_index, current_scale_group in enumerate(
melody_section, chord_start_index):
next_scale_group = next(melody_section_iter, None)
current_chord_name = Voice.chord_sequence[chord_index].chord_name
if self.mode == "ionian" and current_chord_name in Chord.major_mode_alterations:
note_alterations = Chord.major_mode_alterations[
current_chord_name]
elif self.mode == "aeolian" and current_chord_name in Chord.minor_mode_alterations:
note_alterations = Chord.minor_mode_alterations[
current_chord_name]
else:
note_alterations = {}
if self.mode == "aeolian" and current_chord_name in self.primary_dominants:
if melodic_minor:
note_alterations[5] = 1
else:
# catch raised notes inbetween 2 chords
next_chord_name = Voice.chord_sequence[chord_index +
1].chord_name
if next_chord_name in self.primary_dominants:
affected_scale_group = current_scale_group + next_scale_group
else:
affected_scale_group = current_scale_group
scale_group_str = "".join(
str(scale_degree)
for scale_degree in affected_scale_group)
if any(str_combo in scale_group_str
for str_combo in ("56", "65", "-1-2", "-2-1")):
melodic_minor = True
note_alterations[5] = 1
print("Melodic minor!")
for embellish_index, scale_degree in enumerate(
current_scale_group,
note_start_indices.get(chord_index, 0)):
embellish_duration = self.finalized_rhythms[chord_index][
embellish_index]
# account for negative scale degrees
note_offset = note_alterations.get(scale_degree % 7, 0)
embellish_fraction = Fraction(numerator=embellish_duration,
denominator=self.unit_length)
raw_note_duration = int(Voice.max_note_duration *
embellish_fraction)
# integers required for midi output
if raw_note_duration > 960 and self.rhythm_symbols[
chord_index] >= 0 and self.break_notes:
fixed_note_duration = 960
add_rest = True
extra_duration = raw_note_duration - 960
else:
fixed_note_duration = raw_note_duration
midi_pitch = self.melody_range[scale_degree + 3] + note_offset
if chord_index == 7 and embellish_index == 0 and self.rhythm_symbols[
6] == -1:
self.midi_notes.append(
Voice.Note("Rest", self.current_time,
fixed_note_duration))
# needed all numbers in unnested sequence for validation
self.unnested_scale_degrees.pop(object_index + index_shift)
else:
self.midi_notes.append(
Voice.Note(midi_pitch, self.current_time,
fixed_note_duration))
if add_rest:
self.midi_notes.append(
Voice.Note("Rest", self.current_time + 960,
extra_duration))
self.current_time += raw_note_duration
add_rest = False
object_index += 1
return object_index
# adding melody to track
for new_note in Voice.midi_score[0]:
if isinstance(new_note.pitch, int):
MyMIDI.addNote(track, channel, *new_note, 100)
strum_ending = random.choice((True, True, True, False))
print(f"Strum ending: {strum_ending}")
if strum_ending:
time_shift = 0
for voice_index, part in enumerate(Voice.midi_score[2:], 2):
time_shift += 90
old_midi_obj = Voice.midi_score[voice_index][-2]
new_midi_obj = Voice.Note(
old_midi_obj.pitch,
old_midi_obj.time + time_shift,
old_midi_obj.duration,
)
Voice.midi_score[voice_index][-2] = new_midi_obj
# adding chords to track
for voice_index, part in enumerate(Voice.midi_score[1:]):
track += 1
channel += 1
volume = Voice.voice_volumes[voice_index]
for new_note in part:
if isinstance(new_note.pitch, int):
MyMIDI.addNote(track, channel, *new_note, volume)
"""
3/4 time sig feels slower at same tempo because
beats are in groups of 3 instead of 2
def make_accompanyment(self):
"""Rhythmically embellish chord progression"""
if Voice.pickup:
for _ in range(4):
Voice.midi_score.append(
[Voice.Note("Rest", 0, Voice.pickup_duration)])
Voice.chorale_scale_degrees.append([None])
else:
for _ in range(4):
Voice.midi_score.append([])
Voice.chorale_scale_degrees.append([])
chord_accompaniments = {
(2, 2): [
((960, 960), ({0, 1, 2, 3}, {})),
((960 * 3 // 2, 480), ({0, 1, 2, 3}, {})),
((480, 480, 480, 480), ({0, 1, 2, 3}, {}, {0, 1, 2, 3}, {})),
(
(480, 240, 480, 240, 480),
({0, 1, 2, 3}, {}, {0, 1, 2, 3}, {}, {0, 1, 2, 3}),
),
],
(2, 3): [
((960, 960), ({0, 1, 2, 3}, {})),
((960 * 10 // 6, 960 * 2 // 6), ({0, 1, 2, 3}, {})),
(
(960 * 2 // 3, 320, 960 * 2 // 3, 320),
({0, 1, 2, 3}, {}, {0, 1, 2, 3}, {}),
),
],
(3, 2): [
((960, 960 * 2), ({0, 1, 2, 3}, {})),
((960 * 2, 960), ({0, 1, 2, 3}, {})),
(
(480, 480, 480, 480, 480, 480),
({0, 1, 2, 3}, {}, {0, 1, 2, 3}, {}, {0, 1, 2, 3}, {}),
),
],
(4, 2): [
((960, 960), ({0, 1, 2, 3}, {})),
((960 * 3 // 2, 480), ({0, 1, 2, 3}, {})),
((480, 480, 480, 480), ({0, 1, 2, 3}, {}, {0, 1, 2, 3}, {})),
(
(480, 240, 480, 240, 480),
({0, 1, 2, 3}, {}, {0, 1, 2, 3}, {}, {0, 1, 2, 3}),
),
((960 * 2, 960 * 2), ({0, 1, 2, 3}, {})),
],
(4, 3): [((960, 960), ({0, 1, 2, 3}, {})),
((960 * 10 // 6, 960 * 2 // 6), ({0, 1, 2, 3}, {})),
(
(960 * 2 // 3, 320, 960 * 2 // 3, 320),
({0, 1, 2, 3}, {}, {0, 1, 2, 3}, {}),
), ((960 * 2, 960 * 2), ({0, 1, 2, 3}, {}))]
}
chord_accompaniment = chord_accompaniments[Voice.time_sig]
if Voice.time_sig[0] == 4:
if Voice.chord_acceleration:
chord_accompaniment.pop()
note_durations, voices_used = random.choice(chord_accompaniment)
chord_units_used = sum(note_durations) // Voice.max_note_duration
if chord_units_used == 0:
chord_units_used = 1
print(f"Chord units used: {chord_units_used}")
all_note_durations = []
all_voices_used = []
note_index = 0
for _ in range(chord_units_used):
all_note_durations.append([])
all_voices_used.append([])
while sum(all_note_durations[-1]) < Voice.max_note_duration:
all_note_durations[-1].append(note_durations[note_index])
all_voices_used[-1].append(voices_used[note_index])
note_index += 1
print(f"All note durations: {all_note_durations}")
print(f"All voices used: {all_voices_used}")
num_chords = len(Voice.chord_sequence)
self.current_time = Voice.pickup_duration
self.add_chord_section(0, -2, all_note_durations, all_voices_used,
chord_units_used)
end_note_durations = ((Voice.max_note_duration, ),
(Voice.max_note_duration, ))
end_voices_used = [[{0, 1, 2, 3}], [{}]]
if self.repeat_ending:
self.add_chord_section(-2 % num_chords, num_chords,
all_note_durations, all_voices_used,
chord_units_used)
self.add_chord_section(-4 % num_chords, -2, all_note_durations,
all_voices_used, chord_units_used)
self.add_chord_section(-2 % num_chords, num_chords, end_note_durations,
end_voices_used, 2)
def validate_base_melody(self):
"""Check current base melody with idioms"""
melodic_mvmt = "".join(
str(slope)
for slope in self.melodic_direction[:self.chord_index + 1])
if "_" * 3 in melodic_mvmt:
# Avoid long rests
return False
if "_" * 2 in melodic_mvmt:
all_rest_indices = set()
start_index = 0
while True:
rest_index = melodic_mvmt.find("__", start_index)
if rest_index == -1:
break
all_rest_indices.add(rest_index)
start_index = rest_index + 1
if all_rest_indices - self.good_double_rest_indices:
# Avoid triple repeats only between phrases")
return False
start_index = 0
while True:
rest_index = melodic_mvmt.find("_", start_index)
if rest_index in self.bad_single_rest_indices:
return False
if rest_index == -1:
break
start_index = rest_index + 1
relevant_melodic_mvt = melodic_mvmt[1:]
current_move_distance = self.current_degree_choice - self.previous_degree_choice
abs_current_move_distance = abs(current_move_distance)
if abs_current_move_distance > 7:
# Keep leaps within octave
return False
if self.chord_index == 14:
if abs_current_move_distance > 4:
# Don't end with a large leap
return False
if relevant_melodic_mvt.count('>') > relevant_melodic_mvt.count(
'<'):
# Descending motion should predominate
return False
if abs_current_move_distance > 4 and self.chord_index not in self.valid_leap_indices:
# Large leap can only occur halfway through
return False
if len(self.unnested_scale_degrees) >= 3:
if self.chord_index < 9:
nested_part_half = self.nested_scale_degrees[:8]
else:
nested_part_half = self.nested_scale_degrees[8:]
unnested_part_half = Voice.merge_lists(*nested_part_half)
if not Voice.has_proper_leaps(unnested_part_half):
# "Leap should be followed by contrary stepwise motion (full melody)"
return False
if self.chord_index == 11:
ante_cons_transition = Voice.merge_lists(
*self.nested_scale_degrees[5:10])
if (not Voice.has_proper_leaps(ante_cons_transition)
and self.nested_scale_degrees[0] !=
self.nested_scale_degrees[8]):
return False
# score divides into 4 sections, 16 items
# first 2 sections: antecedent
# last 2 sections: consequent
current_section = self.chord_index // 4
section_start_index = current_section * 4
section_scale_degrees = (
self.chosen_scale_degrees[section_start_index:section_start_index +
4])
end_degree = section_scale_degrees[-1]
while end_degree is None:
section_scale_degrees.pop()
end_degree = section_scale_degrees[-1]
section_max_degree = max(section_scale_degrees)
if current_section <= 2:
if section_scale_degrees.count(section_max_degree) > 2:
return False
if section_scale_degrees.count(section_max_degree) == 2:
for scale_degree0, scale_degree1 in zip(
section_scale_degrees, section_scale_degrees[1:]):
if (scale_degree0 == section_max_degree
and scale_degree0 == scale_degree1):
break
else:
return False
if self.chord_index == 2:
if self.chosen_figurations[0] != "IPT":
return False
if self.chord_index >= 3:
previous_melody_note = self.chosen_scale_degrees[self.chord_index -
3]
for chord_index, melody_group in enumerate(
self.nested_scale_degrees[self.chord_index -
3:self.chord_index - 1],
self.chord_index - 3):
for fig_index, current_melody_note in enumerate(melody_group):
pitch_diff = current_melody_note - previous_melody_note
if (abs(pitch_diff) > 4 and pitch_diff < 0 and
(fig_index != 0
or chord_index not in self.valid_leap_indices)):
return False
previous_melody_note = current_melody_note
if (self.chord_index not in self.quick_turn_indices
and melodic_mvmt[self.chord_index - 2:] in {"><>", "<><"}):
# No late melodic jukes
return False
if self.chord_index == 8:
section1 = self.chosen_scale_degrees[:4]
section2 = self.chosen_scale_degrees[4:8]
if max(section1) == max(section2):
return False
elif self.chord_index == 15:
section3 = self.chosen_scale_degrees[8:12]
section4 = self.chosen_scale_degrees[12:]
if max(section3) <= max(section4):
return False
if abs(self.nested_scale_degrees[-3][-1]) > 1:
return False
if (self.chosen_figurations.count("OPT") > 2
and self.nested_scale_degrees[0:4] !=
self.nested_scale_degrees[8:12]):
return False
num_still_figures = self.chosen_figurations.count("CN")
num_still_figures += self.chosen_figurations.count("DN")
num_still_figures += self.chosen_figurations.count("DCN")
if num_still_figures > 2:
return False
if self.chosen_figurations.count("OPT") > 4:
return False
if self.chosen_figurations.count("ANT") > 1:
return False
return True