def test_EfficientVoiceLeading():
"""Test EfficientVoiceLeading module class."""
D_minor_scale = MinorScale('D')
D_minor_scale = Chord(D_minor_scale.getPitches('D4', 'C5'))
E_major_scale = MajorScale('E')
E_major_scale = Chord(E_major_scale.getPitches('E4', 'D#5'))
scale = ChromaticScale('C')
voice_leading = EfficientVoiceLeading(
scale=ChromaticScale('C'), metric=lambda delta: la.norm(delta, inf))
vl, dist = voice_leading(
D_minor_scale,
E_major_scale,
)
assert vl == [1, 1, 0, 1, 1, 0, 1]
assert dist == 1.0
def test_scalePoint():
"""Test scalePoint module method."""
scale = ChromaticScale('C')
scalar_point = scalePoint(chord, scale)
assert scalar_point == [0, 4, 7]
scale = MajorScale('C')
scalar_point = scalePoint(chord, scale)
assert scalar_point == [0, 2, 4]
def test_standardSimplex():
"""Test standardSimplex module method."""
scale = ChromaticScale('C')
standard_simplex = standardSimplex(chord, scale)
assert standard_simplex == [11 / 12, 4 / 12, 3 / 12]
standard_simplex = standardSimplex(chord, scale, False)
assert standard_simplex == [11, 4, 3]
scale = MajorScale('C')
standard_simplex = standardSimplex(chord, scale)
assert standard_simplex == [6 / 7, 2 / 7, 2 / 7]
standard_simplex = standardSimplex(chord, scale, False)
assert standard_simplex == [6, 2, 2]
"""
Example of generator primitives.
This example generates the space of C chords identify by
their ordered pitch class string that are also triads.
"""
import itertools
from orbichord.generator import Generator
from orbichord.symbol import chordSymbolFigure
from music21.scale import ChromaticScale
from orbichord.identify import chordSymbolIndex
scale = ChromaticScale('C')
chord_generator = Generator(dimension=4, pitches=scale.getPitches('C', 'B'))
for chord in chord_generator.run():
print('{} {} - {}'.format(chord, chord.orderedPitchClassesString,
chordSymbolFigure(chord, inversion=0)))
chordA = Chord('C E G')
chordB = Chord('A E C')
# Interscalar assuming any permutation
matrix = interscalarMatrix(chordA, chordB, scale)
print(matrix)
# Interscalar assuming cyclic permutation
matrix = interscalarMatrix(chordA,
chordB,
scale,
permutation=Permutation.CYCLIC)
print(matrix)
# Interscalar assuming no permutation
matrix = interscalarMatrix(chordA, chordB, scale, permutation=Permutation.NONE)
print(matrix)
# Chords with duplicated pitches
scale = ChromaticScale('C')
chordA = Chord('E- A- C C')
chordB = Chord('E E A- B')
# Interscalar assuming any permutation
matrix = interscalarMatrix(chordA, chordB, scale)
print(matrix)
# Interscalar without cardinality invariance
matrix = interscalarMatrix(chordA, chordB, scale, cardinality=False)
print(matrix)
"""
Example of generator primitives.
This example generates the space of C chords identify by
their ordered pitch class string that are also triads.
"""
import itertools
from orbichord.generator import Generator
from orbichord.symbol import chordSymbolFigure
from music21.scale import ChromaticScale
def combinator(iterable, dimension):
return itertools.product(iterable, repeat = dimension)
scale = ChromaticScale('C')
chord_generator = Generator(
combinator = combinator,
pitches = scale.getPitches('C','B')
)
for chord in chord_generator.run():
print('{} {} - {}'.format(
chord,
chord.orderedPitchClassesString,
chordSymbolFigure(chord, inversion=0)
))
"""Create maps used by orbichord.identify module."""
from collections import OrderedDict
import music21.chord
from music21.scale import ChromaticScale
import music21.harmony as harmony
from orbichord.identify import chordSymbolIndex
from pprint import pprint
chords = OrderedDict()
# Get chromatic scale
pitches = ChromaticScale().getPitches('C', 'B')
# Loop over all possible roots
for add1 in range(13):
for kind in harmony.CHORD_TYPES.keys():
for root in pitches:
ref = harmony.ChordSymbol(root=root, kind=kind)
basses = [None] + list(ref.pitches)[1:]
inversions = []
for bass in basses:
bass = bass.name if bass else None
chord = harmony.ChordSymbol(root=root, kind=kind, bass=bass)
if add1 > 0: chord.add(add1 - 1)
key = chordSymbolIndex(chord)
try:
name = harmony.chordSymbolFigureFromChord(chord)
except:
continue