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 testChordSymbolBass(self):
bass = chord_symbols_lib.chord_symbol_bass('Dm9')
self.assertEqual(2, bass)
bass = chord_symbols_lib.chord_symbol_bass('E/G#')
self.assertEqual(8, bass)
bass = chord_symbols_lib.chord_symbol_bass('Bsus2/A')
self.assertEqual(9, bass)
bass = chord_symbols_lib.chord_symbol_bass('Abm7/Cb')
self.assertEqual(11, bass)
bass = chord_symbols_lib.chord_symbol_bass('C#6/9/E#')
self.assertEqual(5, bass)
bass = chord_symbols_lib.chord_symbol_bass('G/o')
self.assertEqual(7, bass)
def testChordSymbolBass(self):
bass = chord_symbols_lib.chord_symbol_bass('Dm9')
self.assertEqual(2, bass)
bass = chord_symbols_lib.chord_symbol_bass('E/G#')
self.assertEqual(8, bass)
bass = chord_symbols_lib.chord_symbol_bass('Bsus2/A')
self.assertEqual(9, bass)
bass = chord_symbols_lib.chord_symbol_bass('Abm7/Cb')
self.assertEqual(11, bass)
bass = chord_symbols_lib.chord_symbol_bass('C#6/9/E#')
self.assertEqual(5, bass)
bass = chord_symbols_lib.chord_symbol_bass('G/o')
self.assertEqual(7, bass)
