def test_simplification(self):
for pitch, alteration in (
('A--4', -2),
('A-4' , -1),
('A4' , 0),
('A#4' , 1),
('A##4', 2),
):
self.assertEqual(Pitch(pitch).alteration, alteration)
for pitch1, pitch2 in (
('C##4', 'D4'),
('C###4', 'D#4'),
('C####4', 'E4'),
('B#4', 'C5'),
('B##4', 'C#5'),
('B###4', 'D5'),
('C-4', 'B3'),
('C--4', 'A#3'),
('C---4', 'A3'),
#! ('B-4', 'A#4'),
('B--4', 'A4'),
('B---4', 'G#4'),
('B----4', 'G4'),
('C' + '#'*12 + '4', 'C5'),
('G' + '#'*12 + '4', 'G5'),
('C' + '-'*12 + '4', 'C3'),
('G' + '-'*12 + '4', 'G3'),
):
self.assertEqual(Pitch(pitch1).simplify_accidental(), Pitch(pitch2))
def test(self):
treble_clef = TrebleKey()
stave = Stave(treble_clef)
reference_line = treble_clef.line
pitch_iterator = Pitch(treble_clef.pitch).pitch_iterator()
for reverse in (True, False):
direction = -1 if reverse else 1
for i, pitch in enumerate(
pitch_iterator.iter(natural=True, reverse=reverse)):
if i > 15: # 3 staves
break
line = reference_line + direction * i / 2
print(line, pitch)
self.assertEqual(stave.line_to_pitch(line), pitch)
self.assertEqual(stave.pitch_to_line(pitch), line)
def test_pitch(self):
pitch = Pitch('C4')
self.assertEqual(pitch.step, 'C')
self.assertEqual(pitch.octave, 4)
self.assertEqual(float(pitch), 60)
pitch = Pitch('C/-1')
self.assertEqual(pitch.step, 'C')
self.assertEqual(pitch.octave, -1)
self.assertEqual(float(pitch), 0)
pitch = Pitch('C', octave=-1)
self.assertEqual(pitch.step, 'C')
self.assertEqual(pitch.octave, -1)
self.assertEqual(float(pitch), 0)
self.assertEqual(pitch.full_name, 'C/-1')
pitch = Pitch('C#4')
self.assertEqual(pitch.step, 'C')
self.assertEqual(pitch.octave, 4)
self.assertEqual(float(pitch), 61)
pitch = Pitch(step='C')
self.assertEqual(pitch.step, 'C')
self.assertIsNone(pitch.accidental)
self.assertIsNone(pitch.octave)
pitch = Pitch(step='C', accidental='#', octave=4)
self.assertEqual(pitch.step, 'C')
self.assertEqual(pitch.accidental, Accidental('#'))
self.assertEqual(pitch.octave, 4)
step_name_to_number = {
'C' : 0,
'D' : 2,
'E' : 4,
'F' : 5,
'G' : 7,
'A' : 9,
'B' : 11,
}
for name, number in step_name_to_number.items():
pitch = Pitch(number)
self.assertEqual(pitch.step, name)
self.assertIsNone(pitch.accidental)
self.assertIsNone(pitch.octave)
self.assertFalse(pitch.spelling_is_inferred)
pitch = Pitch(1)
self.assertEqual(pitch.step, 'C')
self.assertEqual(pitch.accidental, Accidental('#'))
self.assertIsNone(pitch.octave)
self.assertTrue(pitch.spelling_is_inferred)
self.assertEqual(float(Pitch('D4')), 62)
self.assertEqual(float(Pitch('B###3')), 62)
pitch = Pitch('C')
self.assertEqual(str(pitch), 'C')
pitch = Pitch('C-')
self.assertEqual(str(pitch), 'C-')
pitch = Pitch('C#')
self.assertEqual(str(pitch), 'C#')
pitch = Pitch('C4')
self.assertEqual(str(pitch), 'C4')
pitch = Pitch('C#4')
self.assertEqual(str(pitch), 'C#4')
def test_enharmonic(self):
self.assertTrue(Pitch('D-4').is_enharmonic(Pitch('C#4')))
self.assertFalse(Pitch('C4').is_enharmonic(Pitch('C#4')))
self.assertFalse(Pitch('D4').is_enharmonic(Pitch('D-4')))
self.assertFalse(Pitch('C4#').is_enharmonic(Pitch('C#4')))
self.assertFalse(Pitch('D-4').is_enharmonic(Pitch('D-4')))
for pitch1, pitch2 in (
('C#4', 'D-4'),
('D#4', 'E-4'),
('F#4', 'G-4'),
('G#4', 'A-4'),
('A#4', 'B-4'),
):
self.assertEqual(Pitch(pitch1).get_enharmonic(), Pitch(pitch2))
self.assertEqual(Pitch(pitch2).get_enharmonic(), Pitch(pitch1))
# getEnharmonic(E##) => F# getEnharmonic(F#) => G- getEnharmonic(A–) => G getEnharmonic(G) => F##
#! self.assertEqual(Pitch('E##4').get_enharmonic(), Pitch('F#4'))
self.assertEqual(Pitch('E##4').get_enharmonic(), Pitch('G-4'))
self.assertEqual(Pitch('F#4').get_enharmonic(), Pitch('G-4'))
def test_iterator(self):
pitches_4 = [
'C4', 'C#4',
'D4', 'D#4',
'E4',
'F4', 'F#4',
'G4', 'G#4',
'A4', 'A#4',
'B4',
]
natural_pitches_4 = [
'C4',
'D4',
'E4',
'F4',
'G4',
'A4',
'B4',
]
pitches_3 = [pitch.replace('4', '3') for pitch in pitches_4]
natural_pitches_3 = [pitch.replace('4', '3') for pitch in natural_pitches_4]
pitches_5 = [pitch.replace('4', '5') for pitch in pitches_4]
natural_pitches_5 = [pitch.replace('4', '5') for pitch in natural_pitches_4]
pitches = pitches_3 + pitches_4 + pitches_5
natural_pitches = natural_pitches_3 + natural_pitches_4 + natural_pitches_5
for i in range(1, len(pitches) -1):
prev_pitch, pitch, next_pitch = pitches[i-1], pitches[i], pitches[i+1]
self.assertEqual(Pitch(pitch).prev_pitch(), Pitch(prev_pitch))
self.assertEqual(Pitch(pitch).next_pitch(), Pitch(next_pitch))
first_pitch = Pitch('C4')
last_pitch = Pitch('C5')
pitches = pitches_4 + [pitches_5[0]]
natural_pitches = natural_pitches_4 + [natural_pitches_5[0]]
for pitch, pitch_name in zip(first_pitch.pitch_iterator(last_pitch).iter(), pitches):
self.assertEqual(pitch.full_name, pitch_name)
for pitch, pitch_name in zip(first_pitch.pitch_iterator(last_pitch).iter(natural=True),
natural_pitches
):
self.assertEqual(pitch.full_name, pitch_name)
first_pitch = Pitch('C5')
for pitch, pitch_name in zip(first_pitch.pitch_iterator().iter(reverse=True),
reversed(pitches)):
self.assertEqual(pitch.full_name, pitch_name)
for pitch, pitch_name in zip(first_pitch.pitch_iterator().iter(reverse=True, natural=True),
reversed(natural_pitches)):
self.assertEqual(pitch.full_name, pitch_name)
def test_frequency(self):
pitch = Pitch('A4')
self.assertAlmostEqual(pitch.frequency, 440)
def test_midi(self):
self.assertEqual(Pitch(midi= 60), Pitch('C4')) # Midi specification
self.assertEqual(Pitch(midi= 0), Pitch('C', octave=-1))
self.assertEqual(Pitch(midi= 12), Pitch('C0'))
self.assertEqual(Pitch(midi=127), Pitch('G9'))