def to_musicxml(sc_enc):
"Converts Chord tuples (see chorales.prepare_poly) to musicXML"
timestep = Duration(1. / FRAMES_PER_CROTCHET)
musicxml_score = Stream()
prev_chord = dict(
) # midi->(note instance from previous chord), used to determine tie type (start, continue, stop)
for has_fermata, chord_notes in sc_enc:
notes = []
if len(chord_notes) == 0: # no notes => rest for this frame
r = Rest()
r.duration = timestep
musicxml_score.append(r)
else:
for note_tuple in chord_notes:
note = Note()
if has_fermata:
note.expressions.append(expressions.Fermata())
note.midi = note_tuple[0]
if note_tuple[1]: # current note is tied
note.tie = Tie('stop')
if prev_chord and note.pitch.midi in prev_chord:
prev_note = prev_chord[note.pitch.midi]
if prev_note.tie is None:
prev_note.tie = Tie('start')
else:
prev_note.tie = Tie('continue')
notes.append(note)
prev_chord = {note.pitch.midi: note for note in notes}
chord = Chord(notes=notes, duration=timestep)
if has_fermata:
chord.expressions.append(expressions.Fermata())
musicxml_score.append(chord)
return musicxml_score
def to_musicxml(sc_enc):
"Converts Chord tuples (see chorales.prepare_poly) to musicXML"
timestep = Duration(1. / FRAMES_PER_CROTCHET)
musicxml_score = Stream()
prev_chord = dict() # midi->(note instance from previous chord), used to determine tie type (start, continue, stop)
for has_fermata, chord_notes in sc_enc:
notes = []
if len(chord_notes) == 0: # no notes => rest for this frame
r = Rest()
r.duration = timestep
musicxml_score.append(r)
else:
for note_tuple in chord_notes:
note = Note()
if has_fermata:
note.expressions.append(expressions.Fermata())
note.midi = note_tuple[0]
if note_tuple[1]: # current note is tied
note.tie = Tie('stop')
if prev_chord and note.pitch.midi in prev_chord:
prev_note = prev_chord[note.pitch.midi]
if prev_note.tie is None:
prev_note.tie = Tie('start')
else:
prev_note.tie = Tie('continue')
notes.append(note)
prev_chord = { note.pitch.midi : note for note in notes }
chord = Chord(notes=notes, duration=timestep)
if has_fermata:
chord.expressions.append(expressions.Fermata())
musicxml_score.append(chord)
return musicxml_score
