def modifyPitchNameWithAccidentalString(pitchNameToAlter, accidentalString):
'''
Given a pitch name and a length 1 accidental string (such as a sharp or flat),
modify the pitch accordingly. Returns the modified pitch name.
>>> from music21 import *
>>> modifyPitchNameWithAccidentalString('C#', 'N')
'C'
>>> modifyPitchNameWithAccidentalString('C-', 'N')
'C'
>>> modifyPitchNameWithAccidentalString('C', '#')
'C#'
>>> modifyPitchNameWithAccidentalString('C-', '+')
'C'
>>> modifyPitchNameWithAccidentalString('C', '-')
'C-'
OMIT_FROM_DOCS
This method has been implemented using the base40 system. The method
will return an error in the extreme cases where base40 cannot be used.
'''
pitchToAlter = convertToPitch(pitchNameToAlter)
if pitchToAlter.accidental != None:
if (pitchToAlter.accidental.alter >= 2.0) \
and ((accidentalString == "#") or (accidentalString == "+") or (accidentalString == "/")):
raise FiguredBassScaleException("Base40 cannot raise " \
+ str(pitchToAlter.name) + " by a semitone")
elif (pitchToAlter.accidental.alter <= -2.0) and (accidentalString
== "-"):
raise FiguredBassScaleException("Base40 cannot lower " \
+ str(pitchToAlter.name) + " by a semitone")
pitchToAlter.octave = pitchToAlter.implicitOctave
try:
base40ToAlter = base40.pitchToBase40(pitchToAlter)
except Base40Exception:
raise FiguredBassScaleException("Invalid pitch name-> " +
str(pitchNameToAlter))
if (accidentalString == "#") or (accidentalString
== "+") or (accidentalString == "/"):
newPitch = base40.base40ToPitch(base40ToAlter + 1)
elif accidentalString == "-":
newPitch = base40.base40ToPitch(base40ToAlter - 1)
elif accidentalString == "N":
basePitch = pitchToAlter
basePitch.accidental = None
base40RootPitch = base40.pitchToBase40(basePitch)
if base40RootPitch > base40ToAlter:
newPitch = base40.base40ToPitch(base40ToAlter +
1) #Raise by semitone
elif base40RootPitch < base40ToAlter:
newPitch = base40.base40ToPitch(base40ToAlter -
1) #Lower by semitone
else:
raise FiguredBassScaleException("Invalid accidental string: " +
accidentalString)
return newPitch.name
def modifyPitchNameWithAccidentalString(pitchNameToAlter, accidentalString):
'''
Given a pitch name and a length 1 accidental string (such as a sharp or flat),
modify the pitch accordingly. Returns the modified pitch name.
>>> from music21 import *
>>> modifyPitchNameWithAccidentalString('C#', 'N')
'C'
>>> modifyPitchNameWithAccidentalString('C-', 'N')
'C'
>>> modifyPitchNameWithAccidentalString('C', '#')
'C#'
>>> modifyPitchNameWithAccidentalString('C-', '+')
'C'
>>> modifyPitchNameWithAccidentalString('C', '-')
'C-'
OMIT_FROM_DOCS
This method has been implemented using the base40 system. The method
will return an error in the extreme cases where base40 cannot be used.
'''
pitchToAlter = convertToPitch(pitchNameToAlter)
if pitchToAlter.accidental != None:
if (pitchToAlter.accidental.alter >= 2.0) \
and ((accidentalString == "#") or (accidentalString == "+") or (accidentalString == "/")):
raise FiguredBassScaleException("Base40 cannot raise " \
+ str(pitchToAlter.name) + " by a semitone")
elif (pitchToAlter.accidental.alter <= -2.0) and (accidentalString == "-"):
raise FiguredBassScaleException("Base40 cannot lower " \
+ str(pitchToAlter.name) + " by a semitone")
pitchToAlter.octave = pitchToAlter.implicitOctave
try:
base40ToAlter = base40.pitchToBase40(pitchToAlter)
except Base40Exception:
raise FiguredBassScaleException("Invalid pitch name-> " + str(pitchNameToAlter))
if (accidentalString == "#") or (accidentalString == "+") or (accidentalString == "/"):
newPitch = base40.base40ToPitch(base40ToAlter + 1)
elif accidentalString == "-":
newPitch = base40.base40ToPitch(base40ToAlter - 1)
elif accidentalString == "N":
basePitch = pitchToAlter
basePitch.accidental = None
base40RootPitch = base40.pitchToBase40(basePitch)
if base40RootPitch > base40ToAlter:
newPitch = base40.base40ToPitch(base40ToAlter + 1) #Raise by semitone
elif base40RootPitch < base40ToAlter:
newPitch = base40.base40ToPitch(base40ToAlter - 1) #Lower by semitone
else:
raise FiguredBassScaleException("Invalid accidental string: " + accidentalString)
return newPitch.name
def make_music_data(music_stream, musicdata):
notes = all_notes(music_stream)
notes_midi = [note.midi for note in notes]
musicdata.notes_midi = notes_midi
musicdata.notes = [pitchToBase40(note) for note in notes]
musicdata.intervals = intervals_without_direction(notes)
musicdata.intervals_midi = intervals_midi(notes)
musicdata.intervals_with_direction = intervals_with_direction(notes)
musicdata.intervals_classes = intervals_classes(notes)
_durations = [float(note.duration.quarterLength) for note in notes]
musicdata.durations = _durations
musicdata.time_signature = get_time_signature(music_stream)
_key = music_stream.analyze("key")
musicdata.mode = _key.mode
musicdata.key = _key.tonic.name
musicdata.key_midi = _key.tonic.midi
musicdata.ambitus = music_stream.analyze("ambitus").chromatic.directed
musicdata.contour = get_contour(notes_midi)
musicdata.total_duration = sum(_durations)
def make_segments(music, filename):
composer = filename.split("/")[2]
_name1 = splitext(basename(filename))[0]
opus = haydn_opus(_name1) if composer == "haydn" else _name1
_filename = splitext(basename(filename))[0]
_name = opus.split("-")
simple_name = _name[0]
# skip flute and oboe quartets and fugue
if simple_name in ["k285", "k298", "k370", "k546", "op001n0"]:
return
year = years.get(simple_name)
key, mode = key_and_mode(composer, _name)
n = 0
dic = sonority_dict()
for measure in music.chordify(addTies=False):
if isinstance(measure, music21.stream.Measure):
for element in measure:
if isinstance(element, music21.chord.Chord):
notes = element.pitches
notes40 = tuple([pitchToBase40(x) % 40 for x in notes])
notes12 = tuple([x.midi % 12 for x in notes])
notes_name = tuple([x.name.replace("-", "b") for x in notes])
_normal_form = tuple(element.normalForm)
_intervals = tuple(intervals(sorted(notes)))
_duration = float(element.quarterLength)
_beat = element.beat
_beat_duration = element.beatDuration.quarterLength
_beat_strength = element.beatStrength
_interval_vector = tuple(element.intervalVector)
_prime_form = tuple(element.primeForm)
_measure = element.measureNumber
dic['order'].append(n)
dic['composer'].append(composer)
dic['opus'].append(opus)
dic['name'].append(simple_name)
dic['notes_base40'].append(notes40)
dic['notes_base12'].append(notes12)
dic['notes_name'].append(notes_name)
dic['prime_form'].append(_prime_form)
dic['normal_form'].append(_normal_form)
dic['interval_vector'].append(_interval_vector)
dic['intervals'].append(_intervals)
dic['prime_form_string'].append(to_string(_prime_form))
dic['normal_form_string'].append(to_string(_normal_form))
dic['interval_vector_string'].append(to_string(_interval_vector))
dic['intervals_string'].append(to_string(_intervals))
dic['beat'].append(_beat)
dic['duration'].append(_duration)
dic['measure'].append(_measure)
dic['beat_duration'].append(_beat_duration)
dic['beat_strength'].append(_beat_strength)
dic['year'].append(year)
dic['key'].append(key)
dic['mode'].append(mode)
dic['filename'].append(_filename)
n += 1
return dic
def make_note(n):
return Note(n.name, pitchToBase40(n), n.duration.quarterLength)