def getPitches(self, bassPitch, notationString=None, maxPitch=None):
'''
Takes in a bassPitch, a notationString, and a maxPitch representing the highest
possible pitch that can be returned. Returns a sorted list of pitches which
correspond to the pitches of each specific pitch name found through getPitchNames
that fall between the bassPitch and the maxPitch, inclusive of both.
if maxPitch is None, then B5 s used instead.
>>> from music21.figuredBass import realizerScale
>>> fbScale = realizerScale.FiguredBassScale()
Root position triad
>>> [str(p) for p in fbScale.getPitches('C3') ]
['C3', 'E3', 'G3', 'C4', 'E4', 'G4', 'C5', 'E5', 'G5']
First inversion triad
>>> [str(p) for p in fbScale.getPitches('D3', '6') ]
['D3', 'F3', 'B3', 'D4', 'F4', 'B4', 'D5', 'F5', 'B5']
Root position seventh chord, showing MaxPitch
>>> fbScale.getPitches(pitch.Pitch('G3'), '7', 'F4')
[<music21.pitch.Pitch G3>, <music21.pitch.Pitch B3>,
<music21.pitch.Pitch D4>, <music21.pitch.Pitch F4>]
'''
if maxPitch is None:
maxPitch = pitch.Pitch('B5')
bassPitch = convertToPitch(bassPitch)
maxPitch = convertToPitch(maxPitch)
pitchNames = self.getPitchNames(bassPitch, notationString)
iter1 = itertools.product(pitchNames, range(maxPitch.octave + 1))
iter2 = map(lambda x: pitch.Pitch(x[0] + str(x[1])), iter1)
iter3 = itertools.filterfalse(
lambda samplePitch: bassPitch > samplePitch, iter2)
iter4 = itertools.filterfalse(
lambda samplePitch: samplePitch > maxPitch, iter3)
allPitches = list(iter4)
allPitches.sort()
return allPitches
def getSamplePitches(self, bassPitch, notationString=None):
'''
Returns all pitches for a bassPitch and notationString within
an octave of the bassPitch, inclusive of the bassPitch but
exclusive at the upper bound. In other words, this method
returns the most compact complete chord implied by the bassPitch
and its figures.
>>> from music21.figuredBass import realizerScale
>>> fbScale = realizerScale.FiguredBassScale()
>>> fbScale.getSamplePitches('D3', '6') # First inversion triad
[<music21.pitch.Pitch D3>, <music21.pitch.Pitch F3>, <music21.pitch.Pitch B3>]
Root position triad
>>> [str(p) for p in fbScale.getSamplePitches('G3') ]
['G3', 'B3', 'D4']
First inversion seventh chord
>>> [str(p) for p in fbScale.getSamplePitches('B3', '6,5') ]
['B3', 'D4', 'F4', 'G4']
Neapolitan chord
>>> [str(p) for p in fbScale.getSamplePitches('F3', '-6,-') ]
['F3', 'A-3', 'D-4']
Second inversion seventh chord
>>> [str(p) for p in fbScale.getSamplePitches('C5', '4,3') ]
['C5', 'E5', 'F5', 'A5']
Fully diminished seventh chord
>>> [str(p) for p in fbScale.getSamplePitches('C#3', '-7') ]
['C#3', 'E3', 'G3', 'B-3']
'''
bassPitch = convertToPitch(
bassPitch) # Convert string to pitch (if necessary)
maxPitch = bassPitch.transpose('d8')
samplePitches = self.getPitches(bassPitch, notationString, maxPitch)
return samplePitches
def getPitchNames(self, bassPitch, notationString=None):
'''
Takes a bassPitch and notationString and returns a list of corresponding
pitch names based on the scale value and mode above and inclusive of the
bassPitch name.
>>> from music21.figuredBass import realizerScale
>>> fbScale = realizerScale.FiguredBassScale()
>>> fbScale.getPitchNames('D3', '6')
['D', 'F', 'B']
>>> fbScale.getPitchNames('G3')
['G', 'B', 'D']
>>> fbScale.getPitchNames('B3', '6,#5')
['B', 'D', 'F#', 'G']
>>> fbScale.getPitchNames('C#3', '-7') # Fully diminished seventh chord
['C#', 'E', 'G', 'B-']
'''
bassPitch = convertToPitch(
bassPitch) # Convert string to pitch (if necessary)
bassSD = self.realizerScale.getScaleDegreeFromPitch(bassPitch)
nt = notation.Notation(notationString)
if bassSD is None:
bassPitchCopy = copy.deepcopy(bassPitch)
bassNote = note.Note(bassPitchCopy)
if (self.keySig.accidentalByStep(bassNote.pitch.step) !=
bassNote.pitch.accidental):
bassNote.pitch.accidental = self.keySig.accidentalByStep(
bassNote.pitch.step)
bassSD = self.realizerScale.getScaleDegreeFromPitch(bassNote.pitch)
pitchNames = []
for i in range(len(nt.numbers)):
pitchSD = (bassSD + nt.numbers[i] - 1) % 7
samplePitch = self.realizerScale.pitchFromDegree(pitchSD)
pitchName = nt.modifiers[i].modifyPitchName(samplePitch.name)
pitchNames.append(pitchName)
pitchNames.append(bassPitch.name)
pitchNames.reverse()
return pitchNames