def find_next(self):
"""Returns the index and chord of the next chord in
the list of expected chords
"""
assert self.index + 1 < len(self.chords), "No more chords to walk"
current_chord = self.chords[self.index]
current_rn = roman.romanNumeralFromChord(current_chord, self.key)
expected_chord_labels = get_expected_next(current_rn.figure, self.key.type == "major")
assert len(expected_chord_labels) > 0, "No expected chords given"
for i, c in enumerate(self.chords[self.index + 1:]):
rn = roman.romanNumeralFromChord(c, self.key)
if rn.figure in expected_chord_labels:
return self.index + i + 1
def __next__(self):
current_rn = roman.romanNumeralFromChord(self.chords[self.index], self.key)
self.labeled_chords.append(current_rn.figure)
new_index = self.find_next()
if new_index != self.index + 1:
raise ChordProgressionError(self.index - 1)
self.index = new_index
def testTrecentoMadrigal(self):
from music21 import corpus
# c = corpus.parse('beethoven/opus18no1', 2).measures(1, 19)
c = corpus.parse('PMFC_06_Giovanni-05_Donna').measures(1, 30)
# c = corpus.parse('PMFC_06_Giovanni-05_Donna').measures(90, 118)
# c = corpus.parse('PMFC_06_Piero_1').measures(1, 10)
# c = corpus.parse('PMFC_06-Jacopo').measures(1, 30)
# c = corpus.parse('PMFC_12_13').measures(1, 40)
# fix clef
fixClef = True
if fixClef:
startClefs = c.parts[1].getElementsByClass(
'Measure').first().getElementsByClass('Clef')
if startClefs:
clef1 = startClefs[0]
c.parts[1].getElementsByClass('Measure').first().remove(clef1)
c.parts[1].getElementsByClass('Measure').first().insert(
0, clef.Treble8vbClef())
cr = ChordReducer()
# cr.printDebug = True
p = cr.multiPartReduction(c, maxChords=3)
# p = cr.multiPartReduction(c, closedPosition=True)
from music21 import key, roman
cm = key.Key('G')
for thisChord in p.recurse().getElementsByClass('Chord'):
thisChord.lyric = roman.romanNumeralFromChord(
thisChord, cm, preferSecondaryDominants=True).figure
c.insert(0, p)
if self.show:
c.show()
def comparePitches(self):
'''
Single RN-slice comparison for pitches:
do the chords reflect the pitch content of the score section in question?
'''
if self.pitchFeedback is not None: # already done
return
self.pitchFeedback = []
pitchNumerator = 0
for comp in self.harmonicRanges:
overall = 0
harmonicRangeLength = sum([round(sl.quarterLength, 2) for sl in comp.slices])
# Note: Avoid division by 0
for thisSlice in comp.slices: # NB: Rest slices handled already
pitchesNameNoOctave = [x[:-1] for x in thisSlice.pitches] # Pitch only
proportionSame = self._proportionSimilarity(comp, pitchesNameNoOctave)
# weighedSimilarity = proportionSame * slice.beatStrength # TODO
overall += thisSlice.quarterLength * proportionSame / harmonicRangeLength
overall = round(overall, 2)
compLength = comp.endOffset - comp.startOffset
if overall >= self.tolerance:
pitchNumerator += compLength
else: # overall < self.tolerance: # Process feedback and reduce pitchScore.
pitchNumerator += (compLength * overall)
# Suggestions
pl = [pList.pitches for pList in comp.slices]
suggestions = []
for sl in comp.slices:
chd = chord.Chord(sl.pitches)
if (chd.isTriad() or chd.isSeventh()):
rn = roman.romanNumeralFromChord(chd, comp.key)
if rn.figure != comp.figure:
suggestions.append([sl.measure, sl.beat, rn.figure, sl.pitches])
msg = f'Measure {comp.startMeasure}, beat {comp.startBeat}, {comp.figure} in {comp.key}, ' \
f'indicating the pitches {comp.pitches} ' \
f'accounting for successive slices of {pl}.'
fb = Feedback(comp, msg)
fb.matchStrength = f'Match strength estimated at {round(overall * 100, 2)}%.'
fb.suggestions = []
if len(suggestions) > 0:
for s in suggestions:
fb.suggestions.append(f'm{s[0]} b{s[1]} {s[2]} for the slice {s[3]}')
self.pitchFeedback.append(fb)
self.pitchScore = round(pitchNumerator * 100 / self.totalLength, 2)
def compareBass(self):
'''
Single RN-slice comparison for bass pitches (inversion).
Creates feedback for cases where
the bass pitch indicated by the Roman numeral's inversion
does not appear as the lowest note during the span in question.
'''
if self.bassFeedback is not None: # already done
return
self.bassFeedback = []
bassNumerator = 0
for comp in self.harmonicRanges:
# bassPitchesWithOctave = [slice.pitches[0] for slice in comp.slices]
bassPitchesWithOctave = [] # Sometimes the slice is a rest I guess?
for slice in comp.slices:
if len(slice.pitches) > 0:
bassPitchesWithOctave.append(slice.pitches[0])
bassPitchesNoOctave = [p[:-1] for p in bassPitchesWithOctave]
bassPitchesWithOctave = list(set(bassPitchesWithOctave))
if comp.bassPitch not in bassPitchesNoOctave:
inversionSuggestions = []
for bassPitch in bassPitchesNoOctave:
if bassPitch in comp.pitches: # already retrieved
suggestedPitches = comp.pitches
suggestedPitches.append(bassPitch + '0') # To ensure it is lowest
suggestedChord = chord.Chord(suggestedPitches)
rn = roman.romanNumeralFromChord(suggestedChord, comp.key)
inversionSuggestions.append(f'm{comp.startMeasure} b{comp.startBeat} {rn.figure}')
msg = f'Measure {comp.startMeasure}, beat {comp.startBeat}, {comp.figure} in {comp.key}, ' \
f'indicating the bass {comp.bassPitch} ' \
f'for lowest note(s) of: {bassPitchesWithOctave}.'
fb = Feedback(comp, msg)
# fb.matchStrength = N/A
fb.suggestions = []
if len(inversionSuggestions) > 0:
fb.suggestions = list(set(inversionSuggestions)) # Once for each suggestion
self.bassFeedback.append(fb)
else: # comp.bassPitch in bassPitchesNoOctave:
compLength = comp.endOffset - comp.startOffset
bassNumerator += compLength
self.bassScore = bassNumerator / self.totalLength
def convert_harmonic_to_roman_numerals(self):
ret = []
for c in self.harmony:
if c == "-":
ret.append("-")
else:
roman_numeral = roman.romanNumeralFromChord(
c, self.expected_key)
ret.append(simplify_roman_name(roman_numeral))
self.roman_numerals = ret
return ret
def letter2roman(sym):
# for now assume in key of C
print '--- letter2roman', sym,
try:
chord_sym = harmony.ChordSymbol(sym)
except:
print 'WARNING: chord symbol does not exist'
return None
ch = chord.Chord(chord_sym.pitches)
rn = roman.romanNumeralFromChord(ch, key.Key('C'))
print rn.figure
return rn.figure
def testTrecentoMadrigal(self):
from music21 import corpus
# c = corpus.parse('beethoven/opus18no1', 2).measures(1, 19)
c = corpus.parse('PMFC_06_Giovanni-05_Donna').measures(1, 30)
# c = corpus.parse('PMFC_06_Giovanni-05_Donna').measures(90, 118)
# c = corpus.parse('PMFC_06_Piero_1').measures(1, 10)
# c = corpus.parse('PMFC_06-Jacopo').measures(1, 30)
# c = corpus.parse('PMFC_12_13').measures(1, 40)
# fix clef
fixClef = True
if fixClef:
startClefs = c.parts[1].getElementsByClass('Measure')[0].getElementsByClass('Clef')
if startClefs:
clef1 = startClefs[0]
c.parts[1].getElementsByClass('Measure')[0].remove(clef1)
c.parts[1].getElementsByClass('Measure')[0].insert(0, clef.Treble8vbClef())
cr = ChordReducer()
#cr.printDebug = True
p = cr.multiPartReduction(c, maxChords=3)
#p = cr.multiPartReduction(c, closedPosition=True)
from music21 import key, roman
cm = key.Key('G')
for thisChord in p.recurse().getElementsByClass('Chord'):
thisChord.lyric = roman.romanNumeralFromChord(thisChord,
cm,
preferSecondaryDominants=True).figure
c.insert(0, p)
c.show()
from music21 import key
from music21 import interval
bci = corpus.chorales.Iterator(2, 371, numberingSystem = 'riemenschneider', numberList = [1,2,3,4,6,190,371], returnType = 'stream')
chordProgressions = []
intervalSets = []
for chorale in bci:
reduction = chorale.chordify()
analyzedKey = chorale.analyze('key')
chords = []
intervals = []
for c in reduction.flat.getElementsByClass('Chord'):
c.closedPosition(forceOctave=4, inPlace = True)
chordPitches = c.pitches
chordSize = len(chordPitches)
mainInterval = interval.notesToChromatic(chordPitches[0], chordPitches[chordSize-1])
rn = roman.romanNumeralFromChord(c, analyzedKey)
chords.append(rn)
intervals.append(mainInterval)
chordProgressions.append(chords)
intervalSets.append(intervals)
for ch in chordProgressions:
print ch
print "//"
for i in intervalSets:
print i
print "//"
def roman(chord, key):
return chord_name(romanNumeralFromChord(chord, key).romanNumeral)
def chfyChordAndLabel(self,
ignoreParts: int = 2,
tonicizationsRemainInEffect: bool = False):
'''
To use in the case of a partial analysis with chords and key information.
Takes each successive chord and key/tonicization labelling lyric,
works out the chord, and either
returns that as data, or
as appended to the score in question.
Notes for the markup:
changes of key remain in effect until the next marking, but
changes of tonicizations don't by default (settable with tonicizationsRemainInEffect).
That said, you may want to put in reminders of the prevailing key occasionally
(after a tonicization, or indeed elsewhere);
that's fine and doesn't make any different to the analysis.
'''
self.deducedAnalysis = []
reduction = deepcopy(self.score)
for x in range(ignoreParts):
reduction.remove(
reduction.parts[0]) # Top parts of the original score
self.chfyScore = reduction.stripTies().chordify()
self.chfyScore.partName = 'Roman'
currentIndex = 0 # Index
currentKey = 'FAKE KEY' # Initialise empty for inclusion of the first key
currentTonicization = None
if not self.annotationsAndLocations:
self.getAnnotationsAndLocations()
keyData = self.annotationsAndLocations
lenKeyData = len(keyData)
for ch in self.chfyScore.recurse().notes:
startKey = currentKey
if not tonicizationsRemainInEffect:
currentTonicization = None # reset for each chord
# Key Changes and Tonicization
if lenKeyData > currentIndex and [ch.measureNumber, ch.beat
] == keyData[currentIndex][0:2]:
stringInQuestion = keyData[currentIndex][
2] # Before updating current index
currentIndex += 1
if '/' in stringInQuestion: # Then it's a local tonicization
rnFigureString, currentTonicization = stringInQuestion.split(
'/')
# TODO make use of any rnFigureString specified?
# TODO support e.g. '/g' as well as (and converting it to) relative ('/ii')
elif ':' in stringInQuestion: # modulation
currentKey, rnFigureString = stringInQuestion.split(':')
# TODO make use of any rnFigureString specified?
else:
x = re.search('[a-gA-G]', stringInQuestion[0])
if x: # modulation without RN. NB: Doesn't support Fr43 or Ger65
currentKey = stringInQuestion
currentTonicization = None
else:
# TODO accept anything else as a full, user-defined Roman numeral?
raise ValueError(
f'Unrecognised entry {stringInQuestion} '
f'in measure {ch.measureNumber}, '
f'beat {ch.beat}')
if not currentTonicization:
rn = roman.romanNumeralFromChord(ch, key.Key(currentKey))
else: # currentTonicization
localKey = getLocalKey(currentTonicization, currentKey)
rn = roman.romanNumeralFromChord(
ch,
key.Key(localKey),
# sixthMinor=roman.Minor67Default.CAUTIONARY,
# seventhMinor=roman.Minor67Default.CAUTIONARY,
) # TODO: issues with sixth and seventh minor
lyric = str(rn.figure)
# Lyric modifications. Otherwise the lyric is unchanged
if startKey != currentKey:
lyric = currentKey + ': ' + lyric
elif currentTonicization:
lyric = lyric + stringInQuestion
ch.lyric = lyric
thisData = [ch.measureNumber, ch.beat, lyric]
self.deducedAnalysis.append(thisData)
def determineDissonantIdentificationAccuracy(scoreIn, offsetList, keyStr=None):
'''
runs comparison on score to identify dissonances, then compares to the user's
offsetList of identified
dissonances. The score is colored according to the results, and appropriate
information is returned
as a dictionary. See runPerceivedDissonanceAnalysis for full details and an example.
*Color key*
* Green: the user also recognizes this as a dissonant vertical slice GREEN
* Red: the user did not recognize as a dissonant vertical slice RED
* Blue: the user recognized it as a dissonant vertical slice BLUE
>>> s = stream.Score()
>>> p = stream.Part()
>>> c1 = chord.Chord(['C3', 'E3', 'G3'])
>>> c1.isConsonant()
True
>>> p.append(c1)
>>> c2 = chord.Chord(['C3', 'B3', 'D#'])
>>> c2.isConsonant()
False
>>> p.append(c2)
>>> c3 = chord.Chord(['D3', 'F#3', 'A'])
>>> c3.isConsonant()
True
>>> p.append(c3)
>>> c4 = chord.Chord(['B-4', 'F#4', 'A-3'])
>>> c4.isConsonant()
False
>>> p.append(c4)
>>> p.makeMeasures(inPlace=True)
>>> s.append(p)
>>> aData = alpha.webapps.commands.determineDissonantIdentificationAccuracy(s, [2.3, 3.2])
>>> chords = aData['stream'].flat.getElementsByClass('Chord')
>>> chords[0].style.color is None #BLACK (by default)
True
>>> chords[1].style.color #RED
'#cc3300'
>>> chords[2].style.color #BLUE
'#0033cc'
>>> chords[3].style.color #GREEN
'#00cc33'
'''
from music21 import roman
ads = theoryAnalyzer.Analyzer()
score = scoreIn.sliceByGreatestDivisor(addTies=True)
vsList = ads.getVerticalities(score)
user = len(offsetList)
music21VS = 0
both = 0
romanFigureList = []
if keyStr is None:
pieceKey = scoreIn.analyze('key')
else:
pieceKey = key.Key(keyStr)
for (vsNum, vs) in enumerate(vsList):
currentVSOffset = vs.offset(leftAlign=False)
if vsNum + 1 == len(vsList):
nextVSOffset = scoreIn.highestTime
else:
nextVSOffset = vsList[vsNum + 1].offset(leftAlign=False)
if not vs.isConsonant(): #music21 recognizes this as a dissonant vertical slice
music21VS += 1
if _withinRange(offsetList, currentVSOffset, nextVSOffset):
vs.color = '#00cc33'
# the user also recognizes this as a dissonant vertical slice GREEN
both += 1
c = vs.getChord()
romanFigureList.append(roman.romanNumeralFromChord(c, pieceKey).figure)
else:
vs.color = '#cc3300'
#the user did not recognize as a dissonant vertical slice RED
else: #music21 did not recognize this as a dissonant vertical slice
if _withinRange(offsetList, currentVSOffset, nextVSOffset):
vs.color = '#0033cc'
#the user recognized it as a dissonant vertical slice BLUE
score.insert(metadata.Metadata())
score.metadata.composer = scoreIn.metadata.composer
score.metadata.movementName = scoreIn.metadata.movementName
analysisData = {'stream': score,
'numUserIdentified': user,
'numMusic21Identified': music21VS,
'numBothIdentified': both,
'accuracy': both * 100 / music21VS if music21VS != 0 else 100,
'romans': romanFigureList,
'key': pieceKey}
return analysisData
def determineDissonantIdentificationAccuracy(scoreIn, offsetList, keyStr=None):
'''
runs comparison on score to identify dissonances, then compares to the user's
offsetList of identified
dissonances. The score is colored according to the results, and appropriate
information is returned
as a dictionary. See runPerceivedDissonanceAnalysis for full details and an example.
*Color key*
* Green: the user also recognizes this as a dissonant vertical slice GREEN
* Red: the user did not recognize as a dissonant vertical slice RED
* Blue: the user recognized it as a dissonant vertical slice BLUE
>>> s = stream.Score()
>>> p = stream.Part()
>>> c1 = chord.Chord(['C3', 'E3', 'G3'])
>>> c1.isConsonant()
True
>>> p.append(c1)
>>> c2 = chord.Chord(['C3', 'B3', 'D#'])
>>> c2.isConsonant()
False
>>> p.append(c2)
>>> c3 = chord.Chord(['D3', 'F#3', 'A'])
>>> c3.isConsonant()
True
>>> p.append(c3)
>>> c4 = chord.Chord(['B-4', 'F#4', 'A-3'])
>>> c4.isConsonant()
False
>>> p.append(c4)
>>> p.makeMeasures(inPlace=True)
>>> s.append(p)
>>> aData = alpha.webapps.commands.determineDissonantIdentificationAccuracy(s, [2.3, 3.2])
>>> chords = aData['stream'].flat.getElementsByClass('Chord')
>>> chords[0].style.color is None #BLACK (by default)
True
>>> chords[1].style.color #RED
'#cc3300'
>>> chords[2].style.color #BLUE
'#0033cc'
>>> chords[3].style.color #GREEN
'#00cc33'
'''
from music21 import roman
ads = theoryAnalyzer.Analyzer()
score = scoreIn.sliceByGreatestDivisor(addTies=True, inPlace=False)
vsList = ads.getVerticalities(score)
user = len(offsetList)
music21VS = 0
both = 0
romanFigureList = []
if keyStr is None:
pieceKey = scoreIn.analyze('key')
else:
pieceKey = key.Key(keyStr)
for (vsNum, vs) in enumerate(vsList):
currentVSOffset = vs.offset(leftAlign=False)
if vsNum + 1 == len(vsList):
nextVSOffset = scoreIn.highestTime
else:
nextVSOffset = vsList[vsNum + 1].offset(leftAlign=False)
if not vs.isConsonant(
): #music21 recognizes this as a dissonant vertical slice
music21VS += 1
if _withinRange(offsetList, currentVSOffset, nextVSOffset):
vs.color = '#00cc33'
# the user also recognizes this as a dissonant vertical slice GREEN
both += 1
c = vs.getChord()
romanFigureList.append(
roman.romanNumeralFromChord(c, pieceKey).figure)
else:
vs.color = '#cc3300'
#the user did not recognize as a dissonant vertical slice RED
else: #music21 did not recognize this as a dissonant vertical slice
if _withinRange(offsetList, currentVSOffset, nextVSOffset):
vs.color = '#0033cc'
#the user recognized it as a dissonant vertical slice BLUE
score.insert(metadata.Metadata())
scoreInMetadata = scoreIn.metadata
if scoreInMetadata:
score.metadata.composer = scoreInMetadata.composer
score.metadata.movementName = scoreInMetadata.movementName
analysisData = {
'stream': score,
'numUserIdentified': user,
'numMusic21Identified': music21VS,
'numBothIdentified': both,
'accuracy': both * 100 / music21VS if music21VS != 0 else 100,
'romans': romanFigureList,
'key': pieceKey
}
return analysisData
def chfyChordAndLabel(self,
ignoreParts: int = 2,
tonicizationsRemainInEffect: bool = False):
'''
To use in the case of a partial analysis with chords and key information.
Takes each successive chord and key/tonicization labelling lyric,
works out the chord, and either
returns that as data, or
as appended to the score in question.
Notes for the markup:
changes of key remain in effect until the next marking, but
changes of tonicizations don't by default (settable with tonicizationsRemainInEffect).
That said, you may want to put in reminders of the prevailing key occasionally
(after a tonicization, or indeed elsewhere);
that's fine and doesn't make any different to the analysis.
'''
self.deducedAnalysis = []
reduction = deepcopy(self.score)
for x in range(ignoreParts):
reduction.remove(
reduction.parts[0]) # Top parts of the original score
self.chfyScore = reduction.stripTies().chordify()
self.chfyScore.partName = 'Roman'
chNotes = self.chfyScore.recurse().notes
currentIndex = 0 # Index
currentKey = 'FAKE KEY' # Initialise empty for inclusion of the first key
currentTonicization = None
if not self.annotationsAndLocations:
self.getAnnotationsAndLocations()
keyData = self.annotationsAndLocations
lenKeyData = len(keyData)
for ch in chNotes:
startKey = currentKey
if not tonicizationsRemainInEffect: # == False:
currentTonicization = None # To reset for each chord.
# Key Changes and Tonicization
if lenKeyData > currentIndex: # Index from 0, len counts from 1. Gets all of keyData
if [ch.measureNumber, ch.beat] == keyData[currentIndex][0:2]:
stringInQuestion = keyData[currentIndex][
2] # Before changing to new current index
currentIndex += 1
if '/' in stringInQuestion: # Then it's a local tonicization
currentTonicization = stringInQuestion[
1:] # After the '/'
# TODO support e.g. '/g' as well as (and converting it to) relative ('/ii')
else: # Then it's a an actual modulation
currentKey = stringInQuestion
currentTonicization = None # Definitely reset for a key change
# TODO add a condition to support m3-4 = m1-2 style annotation
# TODO accept a roman.romanNumeral (not from chord)
if not currentTonicization:
rn = roman.romanNumeralFromChord(ch, key.Key(currentKey))
else: # currentTonicization
localKey = getLocalKey(currentTonicization, currentKey)
rn = roman.romanNumeralFromChord(
ch,
key.Key(localKey),
# sixthMinor=roman.Minor67Default.CAUTIONARY,
# seventhMinor=roman.Minor67Default.CAUTIONARY,
) # TODO: issues with sixth and seventh minor
lyric = str(rn.figure)
# Lyric modifications. Otherwise the lyric is unchanged
if startKey != currentKey:
lyric = currentKey + ': ' + lyric
elif currentTonicization:
lyric = lyric + stringInQuestion
ch.lyric = lyric
thisData = [ch.measureNumber, ch.beat, lyric]
self.deducedAnalysis.append(thisData)
def main():
parser = argparse.ArgumentParser()
parser.add_argument('-key',
help='run Krumhansl algorithm on a music file',
action="store_true")
parser.add_argument('-rna',
help='run roman numeral analysis on a music file',
action="store_true")
parser.add_argument('-rtc',
help='run real-time chord naming',
action="store_true")
parser.add_argument('-out',
help='read a file and then write it out again',
action="store_true")
args = parser.parse_args()
if not (args.rtc):
root = tk.Tk()
root.withdraw()
file_path = filedialog.askopenfilename()
start = int(time.time())
score = converter.parse(file_path)
read = int(time.time())
sys.stdout.write('file read in ' + str(read - start) + 'ms\n')
if args.key or args.rna:
key = analysis.discrete.analyzeStream(score, 'Krumhansl')
keyTime = int(time.time())
sys.stdout.write(
str(key) + ' established in ' + str(keyTime - read) + 'ms\n')
if args.rna:
delim = ""
chordFilter = stream.filters.ClassFilter('Chord')
sIter = score.recurse().iter
sIter.addFilter(chordFilter)
for a in sIter:
root = a.root()
rn = roman.romanNumeralFromChord(a, key)
sys.stdout.write(delim + str(rn.romanNumeralAlone))
delim = " - "
rnaTime = int(time.time())
sys.stdout.write(' determined in ' + str(rnaTime - read) + 'ms\n')
if args.out:
score.write('abc', 'abcout.abc')
score.write('midi', 'midiout.mid')
score.write('musicxml', 'xmlout.xml')
write = int(time.time())
sys.stdout.write('file written in ' + str(write - read) + 'ms\n')
if args.rtc:
midi.init()
controller = midi.Input(pygame.midi.get_default_input_id())
c = chord.Chord()
while True:
if (controller.poll()):
midi_event = controller.read(5)
notePitch = midi_event[0][0][1]
eventType = midi_event[0][0][0]
n = note.Note(notePitch)
if eventType == 144:
c.add(n)
sys.stdout.write(str(n) + '\n')
if c.isTriad():
sys.stdout.write(c.pitchedCommonName + '\n')
if c.pitchedCommonName == 'A4-minor triad':
break
if eventType == 128:
c.remove(n)
c = chord.Chord(c)
def get_naive_chord_label(self, index):
chord = self.chords[index]
rn = roman.romanNumeralFromChord(chord, self.key)
return rn.figure
def print_chords(chorale):
chorale_key = chorale.analyze("key")
chord_list = get_chords(chorale)
for c in chord_list:
rn = roman.romanNumeralFromChord(c, chorale_key)
print(rn.figure)
bChords = b.chordify()
#adds chordify as another voice to show better
for c in bChords.flat:
if 'Chord' not in c.classes:
continue
c.closedPosition(forceOctave=4, inPlace=True)
#b.measures(0,2).show()
stats = TransitionGraph()
#adds roman numerals at the bottom
for c in bChords.flat.getElementsByClass('Chord'):
rn = roman.romanNumeralFromChord(c, key.Key('A'))
stats.addNumeral(rn)
c.addLyric(str(rn.figure))
#bChords.measures(0, 2).show()
bChords.show('text')
#prints the roman numerals, i.e. lyrics
for c in bChords.measures(0,2).flat:
if 'Chord' not in c.classes:
continue
print c.lyric,
print "\n"
stats.printTransitions()
def music21_extract(p):
"""
Takes in a Music21 score, and outputs dict
"""
parts = []
parts_times = []
parts_delta_times = []
parts_extras = []
parts_time_signatures = []
parts_key_signatures = []
c = p.chordify()
ks = p.parts[0].stream().flat.keySignature
parts_roman_chords = []
parts_chords = []
for this_chord in c.recurse().getElementsByClass('Chord'):
parts_chords.append(this_chord.fullName)
#print(this_chord.measureNumber, this_chord.beatStr, this_chord)
rn = roman.romanNumeralFromChord(this_chord, ks.asKey())
parts_roman_chords.append(rn.figure)
for i, pi in enumerate(p.parts):
part = []
part_time = []
part_delta_time = []
part_extras = []
total_time = 0
ts = pi.stream().flat.timeSignature
ks = pi.stream().flat.keySignature
if len(ks.alteredPitches) == 0:
parts_key_signatures.append([0])
else:
parts_key_signatures.append([ks.sharps])
parts_time_signatures.append((ts.numerator, ts.denominator))
for n in pi.stream().flat.notesAndRests:
if n.isRest:
part.append(0)
else:
try:
part.append(n.midi)
except AttributeError:
continue
if n.tie is not None:
if n.tie.type == "start":
part_extras.append(1)
elif n.tie.type == "continue":
part_extras.append(2)
elif n.tie.type == "stop":
part_extras.append(3)
else:
print("another type of tie?")
from IPython import embed; embed(); raise ValueError()
elif len(n.expressions) > 0:
print("trill or fermata?")
from IPython import embed; embed(); raise ValueError()
else:
part_extras.append(0)
part_time.append(total_time + n.duration.quarterLength)
total_time = part_time[-1]
part_delta_time.append(n.duration.quarterLength)
parts.append(part)
parts_times.append(part_time)
parts_delta_times.append(part_delta_time)
parts_extras.append(part_extras)
return {"parts": parts,
"parts_times": parts_times,
"parts_delta_times": parts_delta_times,
"parts_extras": parts_extras,
"parts_time_signatures": parts_time_signatures,
"parts_key_signatures": parts_key_signatures,
"parts_chords": parts_chords,
"parts_roman_chords": parts_roman_chords}