def test_motif_book_example(self):
s = Beam()
s.append(Note(DiatonicPitch.parse('C:4'), Duration(1, 8)))
s.append(Note(DiatonicPitch.parse('D:4'), Duration(1, 8)))
s.append(Note(DiatonicPitch.parse('C:4'), Duration(1, 8)))
s.append(Note(DiatonicPitch.parse('F#:4'), Duration(1, 8)))
notes = s.get_all_notes()
c = [
EqualPitchConstraint([notes[0], notes[2]]),
NotEqualPitchConstraint([notes[1], notes[3]])
]
m = Motif(s, c, 'A')
cs = Beam()
cs.append(Note(DiatonicPitch.parse('C:5'), Duration(1, 8)))
cs.append(Note(DiatonicPitch.parse('D:5'), Duration(1, 8)))
cs.append(Note(DiatonicPitch.parse('C:5'), Duration(1, 8)))
cs.append(Note(DiatonicPitch.parse('F#:5'), Duration(1, 8)))
c_motif = m.copy_to(cs.get_all_notes()[0])
assert 'A' == c_motif.name
assert len(c_motif.actors) == len(notes)
assert len(c_motif.constraints) == len(c)
assert isinstance(c_motif.constraints[0], EqualPitchConstraint)
assert c_motif.constraints[0].actors[0] == c_motif.actors[0]
assert c_motif.constraints[0].actors[1] == c_motif.actors[2]
assert isinstance(c_motif.constraints[1], NotEqualPitchConstraint)
assert c_motif.constraints[1].actors[0] == c_motif.actors[1]
assert c_motif.constraints[1].actors[1] == c_motif.actors[3]
def motif_example():
print('----- motif_example (Fgure 17.25) -----')
line_str = '{<C-Major: I> iC:4 D E D E E E E C D E D E E E E C D E D E E E E wE}'
score = create_score(line_str, 'piano', (4, 4, 'swww'))
tonality = score.hct.get_hc_by_position(0).tonality
all_notes = score.line.get_all_notes()
constraints = {
StepSequenceConstraint(
[all_notes[0], all_notes[1], all_notes[2], all_notes[3]],
[1, 1, -1])
}
motif = Motif([all_notes[0], all_notes[1], all_notes[2], all_notes[3]],
constraints)
motif1 = motif.copy_to(all_notes[8])
motif2 = motif.copy_to(all_notes[16])
form = MelodicForm([motif, motif1, motif2])
# 11 scalar notes to C:4 (0) to G:5 (11) with pitch unit 1/11
interpreter = ScalarRangeInterpreter(tonality, DiatonicPitch.parse('C:4'),
0, Fraction(1, 11))
pitch_function = GenericUnivariatePitchFunction(three_sin, Position(0),
Position(3), False,
interpreter)
t_reshape = TReshape(score, pitch_function, Range(0, 3), form, True)
results = t_reshape.apply()
filters = MinCurveFitFilter(pitch_function, results)
print('{0} filtered results'.format(len(filters.scored_results)))
for index in range(0, min(5, len(filters.scored_results))):
result = filters.scored_results[index]
print('[{0}] {1} ({2})'.format(index, str_line(result[0].line),
result[1]))
def test_richer_structure(self):
line = Line()
s = Beam()
s.append(Note(DiatonicPitch.parse('C:4'), Duration(1, 8)))
s.append(Note(DiatonicPitch.parse('D:4'), Duration(1, 8)))
line.pin(s)
q1 = Note(DiatonicPitch.parse('E:4'), Duration(1, 4))
line.pin(q1, Offset(1, 4))
q2 = Note(DiatonicPitch.parse('F#:4'), Duration(1, 4))
line.pin(q2, Offset(1, 2))
cs = Beam()
first_note = Note(DiatonicPitch.parse('C:3'), Duration(1, 8))
cs.append(first_note)
cs.append(Note(DiatonicPitch.parse('D:3'), Duration(1, 8)))
line.pin(cs, Offset(2))
cq1 = Note(DiatonicPitch.parse('E:3'), Duration(1, 4))
line.pin(cq1, Offset(9, 4))
cq2 = Note(DiatonicPitch.parse('F#:3'), Duration(1, 4))
line.pin(cq2, Offset(5, 2))
notes = line.get_all_notes()
c = [
EqualPitchConstraint([notes[0], notes[2]]),
NotEqualPitchConstraint([notes[1], notes[3]])
]
m = Motif([s, q1, q2], c, 'A')
print(m)
actors = m.actors
assert 'A' == m.name
assert len(actors) == 4
cc = m.constraints
assert len(cc) == len(c)
assert isinstance(cc[0], EqualPitchConstraint)
cc_a = cc[0].actors
assert len(cc_a) == 2
assert cc_a[0] == actors[0]
assert cc_a[1] == actors[2]
assert isinstance(cc[1], NotEqualPitchConstraint)
cc_b = cc[1].actors
assert len(cc_a) == 2
assert cc_b[0] == actors[1]
assert cc_b[1] == actors[3]
assert 'F#:4' == str(actors[3].diatonic_pitch)
c_motif = m.copy_to(first_note)
assert c_motif is not None
c_actors = c_motif.actors
assert 'A' == c_motif.name
assert len(c_actors) == 4
ccc = c_motif.constraints
assert len(ccc) == len(c)
assert isinstance(ccc[0], EqualPitchConstraint)
ccc_a = ccc[0].actors
assert len(ccc_a) == 2
assert ccc_a[0] == c_actors[0]
assert ccc_a[1] == c_actors[2]
assert isinstance(ccc[1], NotEqualPitchConstraint)
ccc_b = ccc[1].actors
assert len(ccc_a) == 2
assert ccc_b[0] == c_actors[1]
assert ccc_b[1] == c_actors[3]
assert 'F#:3' == str(c_actors[3].diatonic_pitch)
print(c_motif)
def test_simple_motif(self):
s = Beam()
s.append(Note(DiatonicPitch.parse('C:4'), Duration(1, 8)))
s.append(Note(DiatonicPitch.parse('D:4'), Duration(1, 8)))
s.append(Note(DiatonicPitch.parse('E:4'), Duration(1, 8)))
s.append(Note(DiatonicPitch.parse('F#:4'), Duration(1, 8)))
notes = s.get_all_notes()
c = [
EqualPitchConstraint([notes[0], notes[2]]),
NotEqualPitchConstraint([notes[1], notes[3]])
]
m = Motif(s, c, 'A')
actors = m.actors
assert 'A' == m.name
assert len(actors) == len(notes)
cc = m.constraints
assert len(cc) == len(c)
assert isinstance(cc[0], EqualPitchConstraint)
cc_a = cc[0].actors
assert len(cc_a) == 2
assert cc_a[0] == actors[0]
assert cc_a[1] == actors[2]
assert isinstance(cc[1], NotEqualPitchConstraint)
cc_b = cc[1].actors
assert len(cc_a) == 2
assert cc_b[0] == actors[1]
assert cc_b[1] == actors[3]
assert 'F#:4' == str(actors[3].diatonic_pitch)
print(m)
cs = Beam()
first_note = Note(DiatonicPitch.parse('C:3'), Duration(1, 8))
cs.append(first_note)
cs.append(Note(DiatonicPitch.parse('D:3'), Duration(1, 8)))
cs.append(Note(DiatonicPitch.parse('E:3'), Duration(1, 8)))
cs.append(Note(DiatonicPitch.parse('F#:3'), Duration(1, 8)))
c_motif = m.copy_to(first_note)
c_actors = c_motif.actors
assert 'A' == c_motif.name
assert len(c_actors) == len(notes)
ccc = c_motif.constraints
assert len(ccc) == len(c)
assert isinstance(ccc[0], EqualPitchConstraint)
ccc_a = ccc[0].actors
assert len(ccc_a) == 2
assert ccc_a[0] == c_actors[0]
assert ccc_a[1] == c_actors[2]
assert isinstance(ccc[1], NotEqualPitchConstraint)
ccc_b = ccc[1].actors
assert len(ccc_a) == 2
assert ccc_b[0] == c_actors[1]
assert ccc_b[1] == c_actors[3]
assert 'F#:3' == str(c_actors[3].diatonic_pitch)
print(c_motif)