def test_relationships():
assert Note('C') - Note('D') == 10
assert Note('D') - Note('C') == 2
assert Note('B') - Note('C') == 11
assert Note('C') - Note('B') == 1
assert Note('C') - Note('C') == 0
assert Note('G') - Note('C') == 7
assert Note('C') - Note('G') == 5
assert Note('A#') == Note('Bb')
assert Note(Note('C')) == 'C'
def test_alterations():
assert Note('C♯#') == Note('D')
assert Note('C##') == 'D'
assert str(Note('C♯♯')) == 'D'
assert Note('Dbb') == Note('C')
assert Note('C##♯♯') == Note('E')
assert Note('C###').name == 'D♯'
assert Note('Fbb').name == 'E♭'
# We want to keep alterations
assert [Note('C') - alt for alt in range(15)] == \
['C', 'B', 'B♭', 'A', 'A♭', 'G', 'G♭', 'F', 'E', 'E♭', 'D', 'D♭', 'C', 'B', 'B♭']
assert [Note('C') + alt for alt in range(15)] == \
['C', 'C♯', 'D', 'D♯', 'E', 'F', 'F♯', 'G', 'G♯', 'A', 'A♯', 'B', 'C', 'C♯', 'D']
def relativeMajor(self, asStr=False):
if self.mode == 'aeo': # Relative Minor is 1.5 tone above key
return Scale(Note(self.root) + 3, 'ion').name if asStr else Scale(
Note(self.root) + 3, 'ion')
else:
return None
def parallelMajor(self, asStr=False):
if self.mode == 'aeo':
return Scale(Note(self.root), 'ion').name if asStr else Scale(
Note(self.root), 'ion')
else:
return None
def plotNotes(notes, pos=None, name='', ax=0, nbOctaves=1):
if pos is None:
pos = [0, 0, 100, 40]
def plotKey(ax, x, y, w, h, keyType, status):
lw = .5
pad = 0.5
# edgeColor = 'w'
# parms = dict(
# black=dict(color=['skyblue', 'steelblue'], z=1),
# white=dict(color=['skyblue', 'steelblue'], z=0)
# )
edgeColor = 'k'
parms = dict(black=dict(color=['k', 'skyblue'], z=1),
white=dict(color=['w', 'skyblue'], z=0))
ax.add_patch(
FancyBboxPatch((x + pad, y + pad),
abs(w) - 2 * pad,
abs(h) - 2 * pad,
boxstyle="round,pad=" + str(pad),
fc=parms[keyType]['color'][status],
ec=edgeColor,
zorder=parms[keyType]['z'],
lw=lw))
nb = int(np.ceil(len(notes) / (nbOctaves * 12)) * (nbOctaves * 12))
start = 'C' if notes[0] - Note('C') < notes[0] - Note('F') else 'F'
chromatic = Note.chrSharp * 4
chromatic = chromatic[chromatic.index(Note(start)):]
chromatic = chromatic[:nb]
whites = [
n for n in chromatic
if n in [Note(n) for n in ['C', 'D', 'E', 'F', 'G', 'A', 'B']]
]
whiteWidth = pos[2] / len(whites)
blackWidth = whiteWidth / 2
if ax == 0:
figure(figsize=(3, 1))
ax = gca()
axis('off')
nWhites = 0
for i, n in enumerate(chromatic):
if n in whites:
plotKey(ax,
pos[0] + (nWhites) * whiteWidth,
pos[1],
whiteWidth,
pos[3],
keyType='white',
status=n in notes)
nWhites += 1
else:
plotKey(ax,
pos[0] + (nWhites) * whiteWidth - blackWidth / 2,
pos[1] + pos[3] / 3,
blackWidth,
2 * pos[3] / 3,
keyType='black',
status=n in notes)
plot(0, 0, '.w', zorder=-1)
if name:
text(pos[0],
pos[1] + pos[3] / 2,
name,
ha='right',
va='center',
rotation=90)