Timespan Demos¶
Work in progress...
from music21 import *
luca = corpus.parse('luca/gloria').measures(1,8)
tsCol = luca.asTimespans()
tsCol
<TimespanTree {189} (0.0 to 24.0) <music21.stream.Score 0x10bf37358>>
for v in tsCol.iterateVerticalities():
print(v)
<Verticality 0.0 {F3 F4 C5}>
<Verticality 3.0 {F3 F4 D5}>
<Verticality 3.5 {F3 C4 C5}>
<Verticality 4.5 {F3 C4 A4}>
<Verticality 5.0 {F3 C4 F4}>
<Verticality 5.5 {F3 A3 F4}>
<Verticality 6.0 {F3 F4}>
<Verticality 6.5 {F3 F4 A4}>
<Verticality 7.5 {F3 F4 C5}>
<Verticality 8.5 {F3 F4 C5}>
<Verticality 9.0 {C4 E4 G4}>
<Verticality 10.5 {D4 F4 A4}>
<Verticality 12.0 {C4 E4 G4}>
<Verticality 15.0 {G3 G4 D5}>
<Verticality 16.5 {A3 E4 C5}>
<Verticality 17.5 {A3 E4 B4}>
<Verticality 18.0 {D4 F4 A4}>
<Verticality 18.5 {D4 F4 G4}>
<Verticality 19.0 {D4 F4}>
<Verticality 19.5 {C4 E4 G4}>
<Verticality 20.0 {C4 F4 G4}>
<Verticality 20.5 {C4 D4 G4}>
<Verticality 21.0 {C4 E4}>
<Verticality 21.5 {A3 E4}>
<Verticality 22.0 {A3 C4 F4}>
<Verticality 22.5 {B-3 D4 F4}>
<Verticality 23.0 {G3 B-3 D4}>
<Verticality 23.5 {B-3 D4 F4}>
v4 = list(tsCol.iterateVerticalities())[4]
v4
<Verticality 5.0 {F3 C4 F4}>
v4.pitchSet
{<music21.pitch.Pitch F3>, <music21.pitch.Pitch C4>, <music21.pitch.Pitch F4>}
f = sorted(v4.pitchSet)[0]
f
<music21.pitch.Pitch F3>
v4.startTimespans
(<PitchedTimespan (5.0 to 6.0) <music21.note.Note F>>,)
v4.stopTimespans
(<PitchedTimespan (4.5 to 5.0) <music21.note.Note A>>,)
v4.overlapTimespans
(<PitchedTimespan (3.0 to 6.0) <music21.note.Note F>>,
<PitchedTimespan (4.5 to 5.5) <music21.note.Note C>>)
v35 = tsCol.getVerticalityAt(3.5)
v35
<Verticality 3.5 {F3 C4 C5}>
v35.startTimespans
(<PitchedTimespan (3.5 to 4.5) <music21.note.Note C>>,
<PitchedTimespan (3.5 to 4.5) <music21.note.Note C>>)
v35.stopTimespans
(<PitchedTimespan (3.0 to 3.5) <music21.note.Note D>>,
<PitchedTimespan (3.0 to 3.5) <music21.note.Note F>>)
v35.overlapTimespans
(<PitchedTimespan (3.0 to 6.0) <music21.note.Note F>>,)
elTsC = v35.startTimespans[0]
elTsC, elTsC.element
(<PitchedTimespan (3.5 to 4.5) <music21.note.Note C>>, <music21.note.Note C>)
Test previousVerticality with Rest
v22 = tsCol.getVerticalityAt(22.0)
v22
<Verticality 22.0 {A3 C4 F4}>
v22.startTimespans
(<PitchedTimespan (22.0 to 22.5) <music21.note.Note C>>,
<PitchedTimespan (22.0 to 23.0) <music21.note.Note F>>)
elTSfollowingRest = v22.startTimespans[1]
elTSfollowingRest
<PitchedTimespan (22.0 to 23.0) <music21.note.Note F>>
v22.stopTimespans
(<PitchedTimespan (21.0 to 22.0) <music21.note.Note E>>,
<PitchedTimespan (21.5 to 22.0) <music21.note.Rest rest>>)
elTSfollowingRest.part
<music21.stream.Part Cantus>
score = tree.makeExampleScore()
score.show()

tsColSmall = score.asTimespans()
for v in tsColSmall.iterateVerticalities():
if v != []:
print(v)
print(v.getAllVoiceLeadingQuartets())
<Verticality 0.0 {C3 C#3}>
[]
<Verticality 1.0 {C#3 D3}>
---------------------------------------------------------------------------
AttributeError Traceback (most recent call last)
<ipython-input-30-f77717ce7edf> in <module>()
2 if v != []:
3 print(v)
----> 4 print(v.getAllVoiceLeadingQuartets())
5
/Users/cuthbert/git/music21base/music21/tree/verticality.py in getAllVoiceLeadingQuartets(self, includeRests, includeOblique, includeNoMotion, returnObjects, partPairNumbers)
670 and n21 is not None
671 and n22 is not None):
--> 672 vlq = VoiceLeadingQuartet(n11, n12, n21, n22)
673 filteredList.append(vlq)
674
/Users/cuthbert/git/music21base/music21/voiceLeading.py in __init__(self, v1n1, v1n2, v2n1, v2n2, analyticKey)
115 self.key = analyticKey
116 if v1n1 is not None and v1n2 is not None and v2n1 is not None and v2n2 is not None:
--> 117 self._findIntervals()
118
119 def __repr__(self):
/Users/cuthbert/git/music21base/music21/voiceLeading.py in _findIntervals(self)
233
234 def _findIntervals(self):
--> 235 self.vIntervals.append(interval.notesToInterval(self.v1n1, self.v2n1))
236 self.vIntervals.append(interval.notesToInterval(self.v1n2, self.v2n2))
237 self.hIntervals.append(interval.notesToInterval(self.v1n1, self.v1n2))
/Users/cuthbert/git/music21base/music21/interval.py in notesToInterval(n1, n2)
2533 from music21 import pitch
2534 n2 = pitch.Pitch()
-> 2535 gInt = notesToGeneric(n1, n2)
2536 cInt = notesToChromatic(n1, n2)
2537 intObj = intervalFromGenericAndChromatic(gInt, cInt)
/Users/cuthbert/git/music21base/music21/interval.py in notesToGeneric(n1, n2)
1466
1467 '''
-> 1468 staffDist = n2.diatonicNoteNum - n1.diatonicNoteNum
1469 genDist = convertStaffDistanceToInterval(staffDist)
1470 return GenericInterval(genDist)
AttributeError: 'NoneType' object has no attribute 'diatonicNoteNum'
lucaAll = corpus.parse('luca/gloria')
tsCol = lucaAll.asTimespans()
for v in tsCol.iterateVerticalities():
vlqs = v.getAllVoiceLeadingQuartets()
---------------------------------------------------------------------------
AttributeError Traceback (most recent call last)
<ipython-input-32-76b643c51e81> in <module>()
1 for v in tsCol.iterateVerticalities():
----> 2 vlqs = v.getAllVoiceLeadingQuartets()
/Users/cuthbert/git/music21base/music21/tree/verticality.py in getAllVoiceLeadingQuartets(self, includeRests, includeOblique, includeNoMotion, returnObjects, partPairNumbers)
670 and n21 is not None
671 and n22 is not None):
--> 672 vlq = VoiceLeadingQuartet(n11, n12, n21, n22)
673 filteredList.append(vlq)
674
/Users/cuthbert/git/music21base/music21/voiceLeading.py in __init__(self, v1n1, v1n2, v2n1, v2n2, analyticKey)
115 self.key = analyticKey
116 if v1n1 is not None and v1n2 is not None and v2n1 is not None and v2n2 is not None:
--> 117 self._findIntervals()
118
119 def __repr__(self):
/Users/cuthbert/git/music21base/music21/voiceLeading.py in _findIntervals(self)
233
234 def _findIntervals(self):
--> 235 self.vIntervals.append(interval.notesToInterval(self.v1n1, self.v2n1))
236 self.vIntervals.append(interval.notesToInterval(self.v1n2, self.v2n2))
237 self.hIntervals.append(interval.notesToInterval(self.v1n1, self.v1n2))
/Users/cuthbert/git/music21base/music21/interval.py in notesToInterval(n1, n2)
2533 from music21 import pitch
2534 n2 = pitch.Pitch()
-> 2535 gInt = notesToGeneric(n1, n2)
2536 cInt = notesToChromatic(n1, n2)
2537 intObj = intervalFromGenericAndChromatic(gInt, cInt)
/Users/cuthbert/git/music21base/music21/interval.py in notesToGeneric(n1, n2)
1466
1467 '''
-> 1468 staffDist = n2.diatonicNoteNum - n1.diatonicNoteNum
1469 genDist = convertStaffDistanceToInterval(staffDist)
1470 return GenericInterval(genDist)
AttributeError: 'NoneType' object has no attribute 'diatonicNoteNum'
bach = corpus.parse('bwv66.6')
import time
t = time.time()
dummy = alpha.theoryAnalysis.theoryAnalyzer.getVLQs(bach, 0, 1) # two parts only of bach
print(time.time() - t)
0.13318204879760742
t = time.time()
tsCol = bach.asTimespans()
for v in tsCol.iterateVerticalities():
vlqs = v.getAllVoiceLeadingQuartets()
print(time.time() - t) # all parts == 6 pairs
---------------------------------------------------------------------------
AttributeError Traceback (most recent call last)
<ipython-input-35-c7589ac93393> in <module>()
2 tsCol = bach.asTimespans()
3 for v in tsCol.iterateVerticalities():
----> 4 vlqs = v.getAllVoiceLeadingQuartets()
5 print(time.time() - t) # all parts == 6 pairs
/Users/cuthbert/git/music21base/music21/tree/verticality.py in getAllVoiceLeadingQuartets(self, includeRests, includeOblique, includeNoMotion, returnObjects, partPairNumbers)
670 and n21 is not None
671 and n22 is not None):
--> 672 vlq = VoiceLeadingQuartet(n11, n12, n21, n22)
673 filteredList.append(vlq)
674
/Users/cuthbert/git/music21base/music21/voiceLeading.py in __init__(self, v1n1, v1n2, v2n1, v2n2, analyticKey)
115 self.key = analyticKey
116 if v1n1 is not None and v1n2 is not None and v2n1 is not None and v2n2 is not None:
--> 117 self._findIntervals()
118
119 def __repr__(self):
/Users/cuthbert/git/music21base/music21/voiceLeading.py in _findIntervals(self)
233
234 def _findIntervals(self):
--> 235 self.vIntervals.append(interval.notesToInterval(self.v1n1, self.v2n1))
236 self.vIntervals.append(interval.notesToInterval(self.v1n2, self.v2n2))
237 self.hIntervals.append(interval.notesToInterval(self.v1n1, self.v1n2))
/Users/cuthbert/git/music21base/music21/interval.py in notesToInterval(n1, n2)
2533 from music21 import pitch
2534 n2 = pitch.Pitch()
-> 2535 gInt = notesToGeneric(n1, n2)
2536 cInt = notesToChromatic(n1, n2)
2537 intObj = intervalFromGenericAndChromatic(gInt, cInt)
/Users/cuthbert/git/music21base/music21/interval.py in notesToGeneric(n1, n2)
1466
1467 '''
-> 1468 staffDist = n2.diatonicNoteNum - n1.diatonicNoteNum
1469 genDist = convertStaffDistanceToInterval(staffDist)
1470 return GenericInterval(genDist)
AttributeError: 'NoneType' object has no attribute 'diatonicNoteNum'
meterCol = lucaAll.parts[0].asTimespans(classList=(meter.TimeSignature,))
meterCol
<TimespanTree {4} (0.0 to 275.0) <music21.stream.Part Cantus>>
print(meterCol)
<TimespanTree {4} (0.0 to 275.0) <music21.stream.Part Cantus>>
<PitchedTimespan (0.0 to 0.0) <music21.meter.TimeSignature 6/8>>
<PitchedTimespan (81.0 to 81.0) <music21.meter.TimeSignature 2/4>>
<PitchedTimespan (185.0 to 185.0) <music21.meter.TimeSignature 6/8>>
<PitchedTimespan (275.0 to 275.0) <music21.meter.TimeSignature 3/4>>