def separate_track(original_track, num_track=1, default_tempo=100):
set_tempo_event = SetTempoEvent()
set_tempo_event.set_bpm(default_tempo)
original_track.make_ticks_abs()
channel_set = set()
for event in original_track:
if type(event) is NoteOnEvent or type(event) is NoteOffEvent:
channel_set.add(event.channel)
if type(event) is SetTempoEvent:
set_tempo_event = event
channel_track_map = {}
index = 0
for channel in channel_set:
channel_track_map[channel] = index
index += 1
tracks = []
for i in range(max(num_track, len(channel_set))):
tracks.append(
Track(events=[MIDI.copy_event(set_tempo_event)],
tick_relative=False))
for event in original_track:
if type(event) is NoteOnEvent or type(event) is NoteOffEvent:
copied_event = MIDI.copy_event(event)
tracks[channel_track_map[copied_event.channel]].append(
copied_event)
for track in tracks:
track.sort()
track.make_ticks_rel()
original_track.make_ticks_rel()
return tracks
def copy_track(original_track, channel_offset=1, default_tempo=100):
set_tempo_event = SetTempoEvent()
set_tempo_event.set_bpm(default_tempo)
for event in original_track:
if type(event) is SetTempoEvent:
set_tempo_event = event
new_track = Track(events=[MIDI.copy_event(set_tempo_event)],
tick_relative=True)
for event in original_track:
if type(event) is NoteOnEvent or type(event) is NoteOffEvent:
copied_event = MIDI.copy_event(event)
copied_event.channel += channel_offset
new_track.append(copied_event)
return new_track
def new_track(tempo=100):
track = Track()
set_tempo_event = SetTempoEvent()
set_tempo_event.set_bpm(tempo)
track.append(set_tempo_event)
return track
