def test_m21_2_timeline1():
score = m21.converter.parse(
str(Path("tests/test_musicxml/test_score1.musicxml")))
measure = score.parts[0].getElementsByClass("Measure")[4]
gns = measure.getElementsByClass("GeneralNote")
tim = m21_2_timeline(gns)
assert list(tim.events) == [
(0.0, [62, 65, 69]),
(1.0, [62, 65, 69]),
(2.0, [62, 65, 72]),
(3.0, [60, 64, 72]),
]
measure = score.parts[0].getElementsByClass("Measure")[6]
gns = measure.getElementsByClass("GeneralNote")
tim = m21_2_timeline(gns)
assert len(tim) == 6
def test_m21_2_rhythmtree():
score = m21.converter.parse(
str(Path("tests/test_musicxml/test_score1.musicxml")))
measures = score.parts[0].getElementsByClass("Measure")
for m in measures:
gns = m.getElementsByClass("GeneralNote")
rt = m21_2_rhythmtree(gns, div_preferences=[2, 2, 2, 2, 2, 2, 2])
assert rt.get_timeline(0, 4) == m21_2_timeline(gns)
def test_m21_2_timeline3():
score = m21.converter.parse(
str(Path("tests/test_musicxml/test_score3.musicxml")))
measures = score.parts[0].getElementsByClass("Measure")
for m in measures:
gns = m.getElementsByClass("GeneralNote")
tim = m21_2_timeline(gns)
assert tim.end == 4
def get_voices(self):
voices = []
for ip, p in enumerate(self.m21_score.parts):
voices.append([])
for im, m in enumerate(p.getElementsByClass(m21.stream.Measure)):
# consider only the first voice (TO UPDATE)
voice = m.getElementsByClass(m21.stream.Voice)[0]
notes = voice.getElementsByClass("GeneralNote")
voices[ip].extend(notes)
return [m21u.m21_2_timeline(v) for v in voices]
def get_timelines(self):
# return one timeline for each voice.
# TODO: Consider all voices, for now works with only the first of each part
# TODO: merge if there are continuations at the beginning of the measures
timelines = []
for ip, p in enumerate(self.m21_score.parts):
voice_tim = None # empty timeline for the voice
for im, m in enumerate(p.getElementsByClass(m21.stream.Measure)):
# consider only the first voice (TO UPDATE)
voice = m.getElementsByClass(m21.stream.Voice)[0]
gn_list = voice.getElementsByClass(m21.note.GeneralNote)
m_tim = m21u.m21_2_timeline(gn_list).shift_and_rescale(
0, 1) # force each measure to be in the interval 0-1
voice_tim = m_tim if voice_tim is None else voice_tim + m_tim
timelines.append(voice_tim)
return timelines