Unexpected drop in loudness_decr ramp #244
Description
When computing the dynamics direction feature 'loudness_direction_feature.loudness_decr' for Chopin Op.10 No.3, there is an unexpected drop of the ramp value from 4 to 0 but there is no clear indication of the change on the score. To reproduce the problem:
score = pt.load_musicxml('Chopin_op10_no3.musicxml')
na = pt.musicanalysis.note_features.compute_note_array(score, feature_functions=['loudness_direction_feature'])
na['loudness_direction_feature.loudness_decr']
Output is as follows (not sorted by time). From n155 to n156, there is a sudden drop from value 4 to 0, which corresponds to no loudness decrease change at this point in score. Expected behavior: no change in the ramp value and 4 is kept towards the end of the piece.
array([0. , 0. , 4. , 4. , 4. ,
4. , 4. , 4. , 4. , 4. ,
4. , 4. , 4. , 0. , 4. ,
4. , 4. , 4. , 4. , 4. ,
4. , 4. , 4. , 4. , 4. ,
0. , 4. , 4. , 4. , 4. ,
4. , 4. , 4. , 4. , 4. ,
4. , 4. , 0. , 4. , 4. ,
4. , 4. , 4. , 4. , 4. ,
4. , 4. , 4. , 4. , 0. ,
4. , 4. , 4. , 4. , 4. ,
4. , 4. , 4. , 4. , 4. ,
4. , 0. , 4. , 4. , 4. ,
4. , 4. , 4. , 0. , 0. ,
0. , 0. , 0. , 0. , 0. ,
0. , 0. , 0. , 0. , 0. ,
0. , 0. , 0. , 0. , 0. ,
0. , 0. , 0. , 0. , 0. ,
0. , 0. , 0. , 0. , 0. ,
0. , 0. , 0. , 0. , 0. ,
0. , 0. , 0. , 0. , 0. ,
0. , 0. , 0. , 0. , 0. ,
0. , 0. , 0. , 0. , 0. ,
0. , 0. , 0. , 0. , 0. ,
0. , 0. , 0. , 0. , 0. ,
0. , 0. , 0. , 0. , 0. ,
0. , 0. , 0. , 0. , 0. ,
0. , 0. , 0. , 0. , 0. ,
0. , 0. , 0. , 0. , 0. ,
0. , 0. , 0. , 0. , 0. ,
0. , 0. , 0. , 0. , 0. ,
0. , 0. , 0. , 0. , 0. ,
0. , 0. , 0. , 0. , 0. ,
0. , 0. , 0. , 0. , 0. ,
0. , 0. , 0. , 0. , 0. ,
0. , 0. , 0. , 0. , 0. ,
0. , 0. , 0. , 0. , 0. ,
0. , 0. , 0. , 0. , 0. ,
0. , 0. , 0. , 0. , 0. ,
0. , 0. , 0. , 0. , 0. ,
0. , 0. , 0. , 0. , 0. ,
0. , 0. , 0. , 0. , 0. ,
0. , 0. , 0. , 0. , 0. ,
0. , 0. , 0. , 0. , 0. ,
0. , 0. , 0. , 0. , 0. ,
0. , 0. , 0. , 0. , 0. ,
0. , 0.50000006, 0. , 0. , 0. ,
0. , 0. , 0. , 0. , 0. ,
0. , 0. , 0. , 0. , 0.50000006,
0. , 0. , 0. , 0. , 0. ,
0. , 0. , 0. , 0. , 0. ,
0.50000006, 0. , 0. , 0. , 0. ,
0. , 0. , 0. , 0. , 0. ,
0. , 0. , 1. , 0. , 0. ,
0. , 0. , 0. , 0. , 0. ,
0. , 0. , 0. , 1. , 0. ,
0. , 0. , 0. , 0. , 0. ,
0. , 0. , 0. , 0. , 1. ,
0. , 0. , 0. , 0. , 0. ,
0. , 0. , 0. , 0. , 0. ,
1. , 0. , 0. , 0. , 0. ,
0. , 0. , 0. , 0. , 0. ,
0. , 1. , 1. , 0. , 0. ,
0. , 0. , 0. , 0. , 0. ,
0. , 0. , 0. , 1. , 0. ,
0. , 0. , 0. , 0. , 0. ,
0. , 0. , 0. , 0. , 1. ,
0. , 0. , 0. , 0. , 0. ,
0. , 0. , 0. , 0. , 0. ,
1. , 0. , 0. , 0. , 0. ,
0. , 0. , 0. , 0. , 0. ,
0. , 0. , 1. , 0. , 0. ,
0. , 0. , 0. , 0. , 0. ,
0. , 0. , 0. , 1. , 0. ,
0. , 0. , 0. , 0. , 0. ,
0. , 0. , 0. , 0. , 0. ,
1. , 0. , 0. , 0. , 0. ,
0. , 0. , 0. , 0. , 0. ,
0. , 1. , 1. , 0. , 0. ,
0. , 0. , 0. , 0. , 0. ,
0. , 0. , 0. , 0. , 1. ,
0. , 0. , 0. , 0. , 0. ,
0. , 0. , 0. , 0. , 0. ,
1. , 0. , 0. , 0. , 0. ,
0. , 1. , 1. , 1.5000001 , 1.5000001 ,
0. , 0. , 1.5000001 , 2. , 2. ,
2. , 2. , 2.25 , 2.25 , 2.5 ,
2.75 , 2.75 , 2.75 , 0. , 3. ,
3. , 3. , 3. , 3. , 3. ,
3. , 3. , 3. , 3. , 3. ,
0. , 3. , 3. , 3. , 3. ,
3. , 3. , 3. , 3. , 3. ,
3. , 3. , 0. , 3. , 3. ,
3. , 3. , 3. , 3. , 3. ,
3. , 3. , 3. , 3. , 0. ,
3. , 3. , 3. , 3.5 , 3.5 ,
3.5 , 3.5 , 4. , 4. , 4. ,
4. ], dtype=float32)
Score is attached with red marking of beat n156. Conjecture is that the end of a crescendo (loudness_incr) direction affects the ramp value of loudness_decr.