def getAllVoiceLeadingQuartets(self,
includeRests=True,
includeOblique=True,
includeNoMotion=False,
returnObjects=True,
partPairNumbers=None):
'''
>>> c = corpus.parse('luca/gloria').measures(1,8)
>>> tsCol = stream.timespans.streamToTimespanCollection(c)
>>> verticality22 = tsCol.getVerticalityAt(22.0)
>>> from pprint import pprint as pp
>>> for vlq in verticality22.getAllVoiceLeadingQuartets():
... pp(vlq)
<music21.voiceLeading.VoiceLeadingQuartet v1n1=<music21.note.Note E> , v1n2=<music21.note.Note F>, v2n1=<music21.note.Note G>, v2n2=<music21.note.Note C>
<music21.voiceLeading.VoiceLeadingQuartet v1n1=<music21.note.Note E> , v1n2=<music21.note.Note F>, v2n1=<music21.note.Note A>, v2n2=<music21.note.Note A>
<music21.voiceLeading.VoiceLeadingQuartet v1n1=<music21.note.Note G> , v1n2=<music21.note.Note C>, v2n1=<music21.note.Note A>, v2n2=<music21.note.Note A>
>>> for vlq in verticality22.getAllVoiceLeadingQuartets(includeRests = False):
... pp(vlq)
<music21.voiceLeading.VoiceLeadingQuartet v1n1=<music21.note.Note E> , v1n2=<music21.note.Note F>, v2n1=<music21.note.Note A>, v2n2=<music21.note.Note A>
>>> for vlq in verticality22.getAllVoiceLeadingQuartets(includeOblique=False):
... pp(vlq)
<music21.voiceLeading.VoiceLeadingQuartet v1n1=<music21.note.Note E> , v1n2=<music21.note.Note F>, v2n1=<music21.note.Note G>, v2n2=<music21.note.Note C>
>>> verticality22.getAllVoiceLeadingQuartets(includeOblique=False, includeRests=False)
[]
Raw output
>>> for vlqRaw in verticality22.getAllVoiceLeadingQuartets(returnObjects=False):
... pp(vlqRaw)
((<ElementTimespan (21.0 to 22.0) <music21.note.Note E>>,
<ElementTimespan (22.0 to 23.0) <music21.note.Note F>>),
(<ElementTimespan (19.5 to 21.0) <music21.note.Note G>>,
<ElementTimespan (22.0 to 22.5) <music21.note.Note C>>))
((<ElementTimespan (21.0 to 22.0) <music21.note.Note E>>,
<ElementTimespan (22.0 to 23.0) <music21.note.Note F>>),
(<ElementTimespan (21.5 to 22.5) <music21.note.Note A>>,
<ElementTimespan (21.5 to 22.5) <music21.note.Note A>>))
((<ElementTimespan (19.5 to 21.0) <music21.note.Note G>>,
<ElementTimespan (22.0 to 22.5) <music21.note.Note C>>),
(<ElementTimespan (21.5 to 22.5) <music21.note.Note A>>,
<ElementTimespan (21.5 to 22.5) <music21.note.Note A>>))
>>> for vlq in verticality22.getAllVoiceLeadingQuartets(partPairNumbers=[(0,1)]):
... pp(vlq)
<music21.voiceLeading.VoiceLeadingQuartet v1n1=<music21.note.Note E> , v1n2=<music21.note.Note F>, v2n1=<music21.note.Note G>, v2n2=<music21.note.Note C>
>>> for vlq in verticality22.getAllVoiceLeadingQuartets(partPairNumbers=[(0,2),(1,2)]):
... pp(vlq)
<music21.voiceLeading.VoiceLeadingQuartet v1n1=<music21.note.Note E> , v1n2=<music21.note.Note F>, v2n1=<music21.note.Note A>, v2n2=<music21.note.Note A>
<music21.voiceLeading.VoiceLeadingQuartet v1n1=<music21.note.Note G> , v1n2=<music21.note.Note C>, v2n1=<music21.note.Note A>, v2n2=<music21.note.Note A>
'''
import itertools
from music21.voiceLeading import VoiceLeadingQuartet
pairedMotionList = self.getPairedMotion(includeRests=includeRests,
includeOblique=includeOblique)
allQuartets = itertools.combinations(pairedMotionList, 2)
filteredList = []
verticalityStreamParts = self.timespanCollection.source.parts
for thisQuartet in allQuartets:
if includeNoMotion is False:
if (thisQuartet[0][0].pitches == thisQuartet[0][1].pitches
and thisQuartet[1][0].pitches
== thisQuartet[1][1].pitches):
continue
if partPairNumbers is not None:
isAppropriate = False
for pp in partPairNumbers:
thisQuartetTopPart = thisQuartet[0][0].part
thisQuartetBottomPart = thisQuartet[1][0].part
if (((verticalityStreamParts[pp[0]]
== thisQuartetTopPart) or
(verticalityStreamParts[pp[0]]
== thisQuartetBottomPart))
and ((verticalityStreamParts[pp[1]]
== thisQuartetTopPart) or
(verticalityStreamParts[pp[1]]
== thisQuartetBottomPart))):
isAppropriate = True
break
if (isAppropriate is False):
continue
if returnObjects is False:
filteredList.append(thisQuartet)
else:
n11 = thisQuartet[0][0].element
n12 = thisQuartet[0][1].element
n21 = thisQuartet[1][0].element
n22 = thisQuartet[1][1].element
vlq = VoiceLeadingQuartet(n11, n12, n21, n22)
filteredList.append(vlq)
return filteredList
def getAllVoiceLeadingQuartets(self,
includeRests=True,
includeOblique=True,
includeNoMotion=False,
returnObjects=True,
partPairNumbers=None):
'''
>>> c = corpus.parse('luca/gloria').measures(1, 8)
>>> tsCol = tree.fromStream.asTimespans(c, flatten=True,
... classList=(note.Note, chord.Chord))
>>> verticality22 = tsCol.getVerticalityAt(22.0)
>>> from pprint import pprint as pp
>>> for vlq in verticality22.getAllVoiceLeadingQuartets():
... pp(vlq)
<music21.voiceLeading.VoiceLeadingQuartet
v1n1=G4, v1n2=C4, v2n1=E4, v2n2=F4>
<music21.voiceLeading.VoiceLeadingQuartet
v1n1=G4, v1n2=C4, v2n1=A3, v2n2=A3>
<music21.voiceLeading.VoiceLeadingQuartet
v1n1=E4, v1n2=F4, v2n1=A3, v2n2=A3>
>>> for vlq in verticality22.getAllVoiceLeadingQuartets(includeRests=False):
... pp(vlq)
<music21.voiceLeading.VoiceLeadingQuartet
v1n1=E4, v1n2=F4, v2n1=A3, v2n2=A3>
>>> for vlq in verticality22.getAllVoiceLeadingQuartets(includeOblique=False):
... pp(vlq)
<music21.voiceLeading.VoiceLeadingQuartet
v1n1=G4, v1n2=C4, v2n1=E4, v2n2=F4>
>>> verticality22.getAllVoiceLeadingQuartets(includeOblique=False, includeRests=False)
[]
Raw output
>>> for vlqRaw in verticality22.getAllVoiceLeadingQuartets(returnObjects=False):
... pp(vlqRaw)
((<PitchedTimespan (19.5 to 21.0) <music21.note.Note G>>,
<PitchedTimespan (22.0 to 22.5) <music21.note.Note C>>),
(<PitchedTimespan (21.0 to 22.0) <music21.note.Note E>>,
<PitchedTimespan (22.0 to 23.0) <music21.note.Note F>>))
((<PitchedTimespan (19.5 to 21.0) <music21.note.Note G>>,
<PitchedTimespan (22.0 to 22.5) <music21.note.Note C>>),
(<PitchedTimespan (21.5 to 22.5) <music21.note.Note A>>,
<PitchedTimespan (21.5 to 22.5) <music21.note.Note A>>))
((<PitchedTimespan (21.0 to 22.0) <music21.note.Note E>>,
<PitchedTimespan (22.0 to 23.0) <music21.note.Note F>>),
(<PitchedTimespan (21.5 to 22.5) <music21.note.Note A>>,
<PitchedTimespan (21.5 to 22.5) <music21.note.Note A>>))
>>> for vlq in verticality22.getAllVoiceLeadingQuartets(partPairNumbers=[(0, 1)]):
... pp(vlq)
<music21.voiceLeading.VoiceLeadingQuartet
v1n1=G4, v1n2=C4, v2n1=E4, v2n2=F4>
>>> for vlq in verticality22.getAllVoiceLeadingQuartets(partPairNumbers=[(0, 2), (1, 2)]):
... pp(vlq)
<music21.voiceLeading.VoiceLeadingQuartet
v1n1=G4, v1n2=C4, v2n1=A3, v2n2=A3>
<music21.voiceLeading.VoiceLeadingQuartet
v1n1=E4, v1n2=F4, v2n1=A3, v2n2=A3>
'''
from music21.voiceLeading import VoiceLeadingQuartet
pairedMotionList = self.getPairedMotion(includeRests=includeRests,
includeOblique=includeOblique)
allQuartets = itertools.combinations(pairedMotionList, 2)
filteredList = []
verticalityStreamParts = self.timespanTree.source.parts
for thisQuartet in allQuartets:
if includeNoMotion is False:
if (thisQuartet[0][0].pitches == thisQuartet[0][1].pitches
and thisQuartet[1][0].pitches
== thisQuartet[1][1].pitches):
continue
if partPairNumbers is not None:
isAppropriate = False
for pp in partPairNumbers:
thisQuartetTopPart = thisQuartet[0][0].part
thisQuartetBottomPart = thisQuartet[1][0].part
if ((verticalityStreamParts[pp[0]]
== thisQuartetTopPart
or verticalityStreamParts[pp[0]]
== thisQuartetBottomPart)
and (verticalityStreamParts[pp[1]]
== thisQuartetTopPart
or verticalityStreamParts[pp[1]]
== thisQuartetBottomPart)):
isAppropriate = True
break
if not isAppropriate:
continue
if returnObjects is False:
filteredList.append(thisQuartet)
else:
n11 = thisQuartet[0][0].element
n12 = thisQuartet[0][1].element
n21 = thisQuartet[1][0].element
n22 = thisQuartet[1][1].element
if (n11 is not None and n12 is not None and n21 is not None
and n22 is not None):
vlq = VoiceLeadingQuartet(n11, n12, n21, n22)
filteredList.append(vlq)
return filteredList
def isParallelFifth(self, note11, note12, note21, note22):
'''Given four notes, assuming the first pair sounds at the same time and
the second pair sounds at the same time, returns True if the two
harmonic intervals are P5 and False otherwise.'''
vlq = VoiceLeadingQuartet(note11, note12, note21, note22)
return vlq.parallelFifth()
