data extraction to groups of instruments; drums is now avaible

project/midi.py

@@ -30,7 +30,9 @@ def to_samples(midi_file_path, midi_res=settings.midi_resolution):
 
     for track in roll.Multitrack(midi_file_path).tracks:
         if not track.is_drum:
-            key = track.program + 1
+            key = settings.midi_group[track.program + 1]
+        else:
+            key = 'Drums'
 
         # this makes pack of samples of N x 96 x 128 shape
         number_of_beats = floor(track.pianoroll.shape[0] / midi_res)
@@ -38,14 +40,12 @@ def to_samples(midi_file_path, midi_res=settings.midi_resolution):
         track_beats = track_pianoroll.reshape(number_of_beats, midi_res, 128)
 
         # save collected pack of data to dictionary with samples packs for every instrument
-            samples_by_instrument[track.program + 1] = np.concatenate([track_beats, samples_by_instrument[ track.program + 1]], axis=0)
+        samples_by_instrument[key] = np.concatenate([track_beats, samples_by_instrument[key]], axis=0)
-        else:
+
-            # TODO: add code for drums samples
-            pass
     return samples_by_instrument
 
-def to_midi(samples, output_path=settings.generated_midi_path, program=0, tempo=120, beat_resolution=settings.beat_resolution):
+def to_midi(samples, output_path=settings.generated_midi_path, program=0, tempo=120, is_drum=False, beat_resolution=settings.beat_resolution):
-    tracks = [roll.Track(samples, program=program)]
+    tracks = [roll.Track(samples, program=program, is_drum=is_drum)]
     return_midi = roll.Multitrack(tracks=tracks, tempo=tempo, downbeat=[0, 96, 192, 288], beat_resolution=beat_resolution)
     roll.write(return_midi, output_path)
     return return_midi
@@ -72,6 +72,7 @@ def main():
                 pass
             if midi_samples is None:
                 continue
+
             # this is for intrument separation
             for key, value in midi_samples.items():
                 value = delete_empty_samples(value)
@@ -86,7 +87,7 @@ def main():
     for key, value in tqdm(samples_pack_by_instrument.items()):
         if not os.path.exists(output_path):
             os.makedirs(output_path)
-        np.savez_compressed('{}/{}.npz'.format(output_path, settings.midi_program[key]), value)
+        np.savez_compressed('{}/{}.npz'.format(output_path, key), value)
 
         # # Give a preview of what samples looks like
         # fig, axes = plt.subplots(nrows=10, ncols=10, figsize=(20, 20))

project/settings.py

@@ -164,3 +164,150 @@ midi_program = {
     127 : 'Applause',
     128 : 'Gunshot'
 }
+
+midi_group = {
+# Piano
+    1 : 'Piano',
+    2 : 'Piano',
+    3 : 'Piano',
+    4 : 'Piano',
+    5 : 'Piano',
+    6 : 'Piano',
+    7 : 'Piano',
+    8 : 'Piano',
+# Chromatic Percussion
+    9 : 'Chromatic_Percussion',
+    10 : 'Chromatic_Percussion',
+    11 : 'Chromatic_Percussion',
+    12 : 'Chromatic_Percussion',
+    13 : 'Chromatic_Percussion',
+    14 : 'Chromatic_Percussion',
+    15 : 'Chromatic_Percussion',
+    16 : 'Chromatic_Percussion',
+# Organ
+    17 : 'Organ',
+    18 : 'Organ',
+    19 : 'Organ',
+    20 : 'Organ',
+    21 : 'Organ',
+    22 : 'Organ',
+    23 : 'Organ',
+    24 : 'Organ',
+# Guitar
+    25 : 'Guitar',
+    26 : 'Guitar',
+    27 : 'Guitar',
+    28 : 'Guitar',
+    29 : 'Guitar',
+    30 : 'Guitar',
+    31 : 'Guitar',
+    32 : 'Guitar',
+# Bass
+    33 : 'Bass',
+    34 : 'Bass',
+    35 : 'Bass',
+    36 : 'Bass',
+    37 : 'Bass',
+    38 : 'Bass',
+    39 : 'Bass',
+    40 : 'Bass',
+# Strings
+    41 : 'Strings',
+    42 : 'Strings',
+    43 : 'Strings',
+    44 : 'Strings',
+    45 : 'Strings',
+    46 : 'Strings',
+    47 : 'Strings',
+    48 : 'Strings',
+# Ensemble
+    49 : 'Ensemble',
+    50 : 'Ensemble',
+    51 : 'Ensemble',
+    52 : 'Ensemble',
+    53 : 'Ensemble',
+    54 : 'Ensemble',
+    55 : 'Ensemblee',
+    56 : 'Ensemble',
+# Brass
+    57 : 'Brass',
+    58 : 'Brass',
+    59 : 'Brass',
+    60 : 'Brass',
+    61 : 'Brass',
+    62 : 'Brass',
+    63 : 'Brass',
+    64 : 'Brass',
+# Reed
+    65 : 'Reed',
+    66 : 'Reed',
+    67 : 'Reed',
+    68 : 'Reed',
+    69 : 'Reed',
+    70 : 'Reed',
+    71 : 'Reed',
+    72 : 'Reed',
+# Pipe
+    73 : 'Pipe',
+    74 : 'Pipe',
+    75 : 'Pipe',
+    76 : 'Pipe',
+    77 : 'Pipe',
+    78 : 'Pipe',
+    79 : 'Pipe',
+    80 : 'Pipe',
+# Synth Lead
+    81 : 'Synth_Lead',
+    82 : 'Synth_Lead',
+    83 : 'Synth_Lead',
+    84 : 'Synth_Lead',
+    85 : 'Synth_Lead',
+    86 : 'Synth_Lead',
+    87 : 'Synth_Lead',
+    88 : 'Synth_Lead',
+# Synth Pad
+    89 : 'Synth_Pad',
+    90 : 'Synth_Pad',
+    91 : 'Synth_Pad',
+    92 : 'Synth_Pad',
+    93 : 'Synth_Pad',
+    94 : 'Synth_Pad',
+    95 : 'Synth_Pad',
+    96 : 'Synth_Pad',
+# Synth Effects
+    97 : 'Synth_Effects',
+    98 : 'Synth_Effects',
+    99 : 'Synth_Effects',
+    100 : 'Synth_Effects',
+    101 : 'Synth_Effects',
+    102 : 'Synth_Effects',
+    103 : 'Synth_Effects',
+    104 : 'Synth_Effects',
+# Ethnic
+    105 : 'Ethnic',
+    106 : 'Ethnic',
+    107 : 'Ethnic',
+    108 : 'Ethnic',
+    109 : 'Ethnic',
+    110 : 'Ethnic',
+    111 : 'Ethnic',
+    112 : 'Ethnic',
+# Percussive
+    113 : 'Percussive',
+    114 : 'Percussive',
+    115 : 'Percussive',
+    116 : 'Percussive',
+    117 : 'Percussive',
+    118 : 'Percussive',
+    119 : 'Percussive',
+    120 : 'Percussive',
+# Sound Effects
+    121 : 'Sound_Effects',
+    122 : 'Sound_Effects',
+    123 : 'Sound_Effects',
+    124 : 'Sound_Effects',
+    125 : 'Sound_Effects',
+    126 : 'Sound_Effects',
+    127 : 'Sound_Effects',
+    128 : 'Sound_Effects'
+}