def ascending(self):
notes = [self.tonic]
notes.append(intervals.minor_third(notes[0]))
notes.append(intervals.perfect_fourth(notes[0]))
notes.append(intervals.perfect_fifth(notes[0]))
notes.append(intervals.minor_seventh(notes[0]))
return notes * self.octaves + [notes[0]]
def minor_eleventh(note):
"""Build a minor eleventh chord on note.
Example:
>>> minor_eleventh('C')
['C', 'Eb', 'G', 'Bb', 'F']
"""
return minor_seventh(note) + [intervals.perfect_fourth(note)]
def suspended_fourth_triad(note):
"""Build a suspended fourth triad on note.
Example:
>>> suspended_fourth_triad('C')
['C', 'F', 'G']
"""
return [note, intervals.perfect_fourth(note), intervals.perfect_fifth(note)]
def minor_eleventh(note):
"""Build a minor eleventh chord on note.
Example:
>>> minor_eleventh('C')
['C', 'Eb', 'G', 'Bb', 'F']
"""
return minor_seventh(note) + [intervals.perfect_fourth(note)]
def lydian_dominant_seventh(note):
"""Build the lydian dominant seventh (7#11) on note.
Example:
>>> lydian_dominant_seventh('C')
['C', 'E', 'G', 'Bb', 'F#']
"""
return (dominant_seventh(note) +
[notes.augment(intervals.perfect_fourth(note))])
def test_perfect_fourth(self):
majors = {
'C': 'F',
'Cb': 'Fb',
'Cbb': 'Fbb',
'C#': 'F#',
'C##': 'F##',
'B': 'E',
'A': 'D',
'F#': 'B',
'F': 'Bb',
'Fb': 'Bbb',
}
for x in majors.keys():
self.assertEqual(
majors[x], intervals.perfect_fourth(x),
'The perfect fourth of %s is not %s, expecting %s' %
(x, intervals.perfect_fourth(x), majors[x]))
def lydian_dominant_seventh(note):
"""Build the lydian dominant seventh (7#11) on note.
Example:
>>> lydian_dominant_seventh('C')
['C', 'E', 'G', 'Bb', 'F#']
"""
return (dominant_seventh(note) +
[notes.augment(intervals.perfect_fourth(note))])
def eleventh(note):
"""Build an eleventh chord on note.
Example:
>>> eleventh('C')
['C', 'G', 'Bb', 'F']
"""
return [note, intervals.perfect_fifth(note), intervals.minor_seventh(note),
intervals.perfect_fourth(note)]
def create_interval_perfect(start_note):
start = start_note
options = [
intervals.perfect_fifth(start),
intervals.perfect_fourth(start),
intervals.major_unison(start)
]
end = options[(randint(0, 2))]
interval = intervals.determine(start, end)
return interval
def descending(self):
tonic = self.tonic
notes = []
for i in range(self.octaves * 2):
notes += [
reduce_accidentals(note)
for note in list(Mixolydian(tonic).descending()[:4])
]
tonic = intervals.perfect_fourth(tonic)
if self.octaves == 1:
return notes
else:
return notes[:-self.octaves]
def create_interval_consonant(start_note):
start = start_note
options = [
intervals.perfect_fifth(start),
intervals.perfect_fourth(start),
intervals.major_unison(start),
intervals.major_third(start),
intervals.minor_third(start),
intervals.major_sixth(start),
intervals.minor_sixth(start)
]
end = options[(randint(0, len(options) - 1))]
interval = intervals.determine(start, end)
return interval
def ascending(self, l=None):
tonic = self.tonic
if l is None:
l = self.octaves * 3
for i in range(l):
notes += [
reduce_accidentals(note)
for note in list(Mixolydian(tonic).ascending()[:3])
]
tonic = intervals.perfect_fourth(tonic)
if self.octaves == 1:
return notes[:-1]
else:
return notes[:-self.octaves]
def lydian_major_seventh(note):
"""Build the lydian major seventh (M7#11) on note.
"""
return (major_seventh(note) +
[notes.augment(intervals.perfect_fourth(note))])