def render(self, sequence):
# Sort text annotations by time.
annotations = sorted(sequence.text_annotations, key=lambda a: a.time)
prev_time = 0.0
prev_figure = NO_CHORD
for annotation in annotations:
if annotation.time >= sequence.total_time:
break
if annotation.annotation_type == CHORD_SYMBOL:
if prev_figure != NO_CHORD:
# Render the previous chord.
pitches = chord_symbols_lib.chord_symbol_pitches(prev_figure)
bass_pitch = chord_symbols_lib.chord_symbol_bass(prev_figure)
self._render_notes(sequence=sequence,
pitches=pitches,
bass_pitch=bass_pitch,
start_time=prev_time,
end_time=annotation.time)
prev_time = annotation.time
prev_figure = annotation.text
if (prev_time < sequence.total_time and
prev_figure != NO_CHORD):
# Render the last chord.
pitches = chord_symbols_lib.chord_symbol_pitches(prev_figure)
bass_pitch = chord_symbols_lib.chord_symbol_bass(prev_figure)
self._render_notes(sequence=sequence,
pitches=pitches,
bass_pitch=bass_pitch,
start_time=prev_time,
end_time=sequence.total_time)
def render(self, sequence):
# Sort text annotations by time.
annotations = sorted(sequence.text_annotations, key=lambda a: a.time)
prev_time = 0.0
prev_figure = NO_CHORD
for annotation in annotations:
if annotation.time >= sequence.total_time:
break
if annotation.annotation_type == CHORD_SYMBOL:
if prev_figure != NO_CHORD:
# Render the previous chord.
pitches = chord_symbols_lib.chord_symbol_pitches(prev_figure)
bass_pitch = chord_symbols_lib.chord_symbol_bass(prev_figure)
self._render_notes(sequence=sequence,
pitches=pitches,
bass_pitch=bass_pitch,
start_time=prev_time,
end_time=annotation.time)
prev_time = annotation.time
prev_figure = annotation.text
if (prev_time < sequence.total_time and
prev_figure != NO_CHORD):
# Render the last chord.
pitches = chord_symbols_lib.chord_symbol_pitches(prev_figure)
bass_pitch = chord_symbols_lib.chord_symbol_bass(prev_figure)
self._render_notes(sequence=sequence,
pitches=pitches,
bass_pitch=bass_pitch,
start_time=prev_time,
end_time=sequence.total_time)
def events_to_input(self, events, position):
"""Returns the input vector for the given position in the chord progression.
Indices [0, 36]:
[0]: Whether or not this chord is "no chord".
[1, 12]: A one-hot encoding of the chord root pitch class.
[13, 24]: Whether or not each pitch class is present in the chord.
[25, 36]: A one-hot encoding of the chord bass pitch class.
Args:
events: A magenta.music.ChordProgression object.
position: An integer event position in the chord progression.
Returns:
An input vector, an self.input_size length list of floats.
"""
chord = events[position]
input_ = [0.0] * self.input_size
if chord == NO_CHORD:
input_[0] = 1.0
return input_
root = chord_symbols_lib.chord_symbol_root(chord)
input_[1 + root] = 1.0
pitches = chord_symbols_lib.chord_symbol_pitches(chord)
for pitch in pitches:
input_[1 + NOTES_PER_OCTAVE + pitch] = 1.0
bass = chord_symbols_lib.chord_symbol_bass(chord)
input_[1 + 2 * NOTES_PER_OCTAVE + bass] = 1.0
return input_
def events_to_input(self, events, position):
"""Returns the input vector for the given position in the chord progression.
Indices [0, 36]:
[0]: Whether or not this chord is "no chord".
[1, 12]: A one-hot encoding of the chord root pitch class.
[13, 24]: Whether or not each pitch class is present in the chord.
[25, 36]: A one-hot encoding of the chord bass pitch class.
Args:
events: A magenta.music.ChordProgression object.
position: An integer event position in the chord progression.
Returns:
An input vector, an self.input_size length list of floats.
"""
chord = events[position]
input_ = [0.0] * self.input_size
if chord == NO_CHORD:
input_[0] = 1.0
return input_
root = chord_symbols_lib.chord_symbol_root(chord)
input_[1 + root] = 1.0
pitches = chord_symbols_lib.chord_symbol_pitches(chord)
for pitch in pitches:
input_[1 + NOTES_PER_OCTAVE + pitch] = 1.0
bass = chord_symbols_lib.chord_symbol_bass(chord)
input_[1 + 2 * NOTES_PER_OCTAVE + bass] = 1.0
return input_
def testChordSymbolPitches(self):
pitches = chord_symbols_lib.chord_symbol_pitches('Am')
pitch_classes = set(pitch % 12 for pitch in pitches)
self.assertEqual(set([0, 4, 9]), pitch_classes)
pitches = chord_symbols_lib.chord_symbol_pitches('D7b9')
pitch_classes = set(pitch % 12 for pitch in pitches)
self.assertEqual(set([0, 2, 3, 6, 9]), pitch_classes)
pitches = chord_symbols_lib.chord_symbol_pitches('F/o')
pitch_classes = set(pitch % 12 for pitch in pitches)
self.assertEqual(set([3, 5, 8, 11]), pitch_classes)
pitches = chord_symbols_lib.chord_symbol_pitches('C-(M7)')
pitch_classes = set(pitch % 12 for pitch in pitches)
self.assertEqual(set([0, 3, 7, 11]), pitch_classes)
pitches = chord_symbols_lib.chord_symbol_pitches('E##13')
pitch_classes = set(pitch % 12 for pitch in pitches)
self.assertEqual(set([1, 3, 4, 6, 8, 10, 11]), pitch_classes)
pitches = chord_symbols_lib.chord_symbol_pitches('G(add2)(#5)')
pitch_classes = set(pitch % 12 for pitch in pitches)
self.assertEqual(set([3, 7, 9, 11]), pitch_classes)
def testChordSymbolPitches(self):
pitches = chord_symbols_lib.chord_symbol_pitches('Am')
pitch_classes = set(pitch % 12 for pitch in pitches)
self.assertEqual(set([0, 4, 9]), pitch_classes)
pitches = chord_symbols_lib.chord_symbol_pitches('D7b9')
pitch_classes = set(pitch % 12 for pitch in pitches)
self.assertEqual(set([0, 2, 3, 6, 9]), pitch_classes)
pitches = chord_symbols_lib.chord_symbol_pitches('F/o')
pitch_classes = set(pitch % 12 for pitch in pitches)
self.assertEqual(set([3, 5, 8, 11]), pitch_classes)
pitches = chord_symbols_lib.chord_symbol_pitches('C-(M7)')
pitch_classes = set(pitch % 12 for pitch in pitches)
self.assertEqual(set([0, 3, 7, 11]), pitch_classes)
pitches = chord_symbols_lib.chord_symbol_pitches('E##13')
pitch_classes = set(pitch % 12 for pitch in pitches)
self.assertEqual(set([1, 3, 4, 6, 8, 10, 11]), pitch_classes)
pitches = chord_symbols_lib.chord_symbol_pitches('G(add2)(#5)')
pitch_classes = set(pitch % 12 for pitch in pitches)
self.assertEqual(set([3, 7, 9, 11]), pitch_classes)
