Removes notes whose total tied duration is strictly less than a threshold.
For each note that starts a tied chain, the total tied duration is compared
against the threshold. If the total duration is strictly less than the
threshold, all notes in the chain are removed.
Zero is a special case: passing threshold = 0 removes only notes whose
tied duration is exactly zero.
Parameters:
-
score
(Score)
–
-
threshold
(float)
–
Duration threshold in beats. Notes with (tied) duration < threshold
are removed. Pass 0 to remove only zero-duration grace notes.
Returns:
-
Score
–
A copy of the score with short notes removed.
Source code in amads/algorithms/dropshortnotes.py
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66 | def dropshortnotes(score: Score, threshold: float) -> Score:
"""
Removes notes whose total tied duration is strictly less than a threshold.
For each note that starts a tied chain, the total tied duration is compared
against the threshold. If the total duration is strictly less than the
threshold, all notes in the chain are removed.
Zero is a special case: passing `threshold = 0` removes only notes whose
tied duration is exactly zero.
Parameters
----------
score : Score
The score to filter.
threshold : float
Duration threshold in beats. Notes with (tied) `duration < threshold`
are removed. Pass `0` to remove only zero-duration grace notes.
Returns
-------
Score
A copy of the score with short notes removed.
"""
# 1. Copy the score to avoid modifying the original
score_copy = cast(Score, score.copy())
all_notes = list(score_copy.find_all(Note))
# 2. Find notes to remove, starting only from chain heads
tied_to_ids = {id(n.tie) for n in all_notes if n.tie}
to_remove = []
for note in all_notes:
if id(note) in tied_to_ids:
continue
if threshold == 0:
should_drop = note.duration == 0
else:
should_drop = note.duration < threshold
if should_drop:
node = note
while isinstance(node, Note):
to_remove.append(node)
if node.tie is None:
break
node = node.tie
# 3. Remove all collected notes
for note in to_remove:
if note.parent:
note.parent.remove(note)
return score_copy
|