Parangonar
Parangonar is a Python package for note alignment of symbolic music. Parangonar uses Partitura as file I/O utility. Note alignments produced py Parangonar can be visualized using the web tool Parangonda
Installation
The easiest way to install the package is via pip
from the PyPI (Python
Package Index):
pip install parangonar
This will install the latest release of the package and will install all dependencies automatically.
Quickstart
The following code loads the contents of a a previously aligned performance and score alignment file (encoded in the match file format).
A new alignment is computed using a hierarchical DTW-based note matcher and the resulting alignment are compared to the ground truth:
import parangonar as pa
import partitura as pt
perf_match, groundtruth_alignment, score_match = pt.load_match(
filename= pa.EXAMPLE,
create_score=True
)
# compute note arrays from the loaded score and performance
pna_match = perf_match.note_array()
sna_match = score_match.note_array()
# match the notes in the note arrays
sdm = pa.AutomaticNoteMatcher()
pred_alignment = sdm(sna_match,
pna_match,
verbose_time=True)
# compute f-score and print the results
print('------------------')
types = ['match','insertion', 'deletion']
for alignment_type in types:
precision, recall, f_score = pa.fscore_alignments(pred_alignment,
groundtruth_alignment,
alignment_type)
print('Evaluate ',alignment_type)
print('Precision: ',format(precision, '.3f'),
'Recall ',format(recall, '.3f'),
'F-Score ',format(f_score, '.3f'))
print('------------------')
Aligning MusicXML Scores and MIDI Performances
import parangonar as pa
import partitura as pt
score = pt.load_score(filename= 'path/to/score_file')
performance = pt.load_performance_midi(filename= 'path/to/midi_file')
# compute note arrays from the loaded score and performance
pna = performance.note_array()
sna = score.note_array()
# match the notes in the note arrays
sdm = pa.AutomaticNoteMatcher()
pred_alignment = sdm(sna_match, pna_match)
File I/O for note alignments
import partitura as pt
import parangonar as pa
# load note alignments of the asap dataset:
# https://github.com/CPJKU/asap-dataset/tree/note_alignments
alignment = pt.io.importparangonada.load_alignment_from_ASAP(filename= 'path/to/note_alignment.tsv')
# export a note alignment for visualization with parangonada:
# https://sildater.github.io/parangonada/
pa.match.save_parangonada_csv(alignment,
performance_data,
score_data,
outdir="path/to/dir")
# import a corrected note alignment from parangonada:
# https://sildater.github.io/parangonada/
alignment = pt.io.importparangonada.load_parangonada_alignment(filename= 'path/to/note_alignment.csv')
Anchor Point Alignment Example
import parangonar as pa
import partitura as pt
perf_match, groundtruth_alignment, score_match = pt.load_match(
filename= pa.EXAMPLE,
create_score=True
)
# compute note arrays from the loaded score and performance
pna_match = perf_match.note_array()
sna_match = score_match.note_array()
# compute synthetic anchor points every 4 beats
nodes = pa.match.node_array(score_match[0],
perf_match[0],
groundtruth_alignment,
node_interval=4)
# match the notes in the note arrays
apdm = pa.AnchorPointNoteMatcher()
pred_alignment = apdm(sna_match,
pna_match,
nodes)
# compute f-score and print the results
print('------------------')
types = ['match','insertion', 'deletion']
for alignment_type in types:
precision, recall, f_score = pa.fscore_alignments(pred_alignment,
groundtruth_alignment,
alignment_type)
print('Evaluate ',alignment_type)
print('Precision: ',format(precision, '.3f'),
'Recall ',format(recall, '.3f'),
'F-Score ',format(f_score, '.3f'))
print('------------------')
Visualize Alignment
import parangonar as pa
import partitura as pt
perf_match, alignment, score_match = pt.load_match(
filename= pa.EXAMPLE,
create_score=True
)
pna_match = perf_match.note_array()
sna_match = score_match.note_array()
# show or save plot of note alignment
pa.plot_alignment(pna_match,
sna_match,
alignment,
save_file = False)
License
The code in this package is licensed under the Apache 2.0 License. For details, please see the LICENSE file.