Notes sometimes having impossible ties

[leleogere]

In some scores such as ASAP Schumann/Kreisleriana/3/xml_score.musicxml, a couple of notes are tied to an incorrect note, placed before them or in parallel to them:

from pathlib import Path
import partitura as pt
import partitura.score

path = Path("~/Documents/datasets/asap-dataset/Schumann/Kreisleriana/3/xml_score.musicxml").expanduser()

score = pt.load_musicxml(path)
part = score.parts[0]

measure_map = part.measure_number_map
for note in part.iter_all(cls=pt.score.Note):
    if note.tie_next and note.end.t > note.tie_next.start.t:
        print(f"Measure {measure_map(note.start.t)}:")
        print(f"   * {note}")
        print(f"  -> {note.tie_next}")

Measure 63:
   * 127232--127488 Note id=None voice=1 staff=1 type=16th tie_group=None+None pitch=Db4
  -> 125440--125696 Note id=None voice=2 staff=1 type=16th tie_group=None+None pitch=Db4
Measure 152:
   * 304640--305152 Note id=None voice=5 staff=2 type=eighth articulations=(accent) tie_group=None+None pitch=C3
  -> 303104--305152 Note id=None voice=6 staff=2 type=half tie_group=None+None pitch=C3
Measure 153:
   * 305152--307200 Note id=None voice=4 staff=2 type=half tie_group=None+None pitch=C3
  -> 305152--305664 Note id=None voice=5 staff=2 type=eighth tie_group=None+None pitch=C3

While I suppose that there are some encoding errors in the MusicXML (I haven't taken the time to dig the score and the tie-parsing code), I feel like those should be removed by Partitura when parsing the score (probably with a warning), because they do not really make sense. In a normal case, a tied note should only be allowed to start at of after note.end.t, not before.