def makeNote(track, pitch, velocity): e = midi.MidiEvent(track, type=midi.ChannelVoiceMessages.NOTE_ON, channel=1) e.pitch = int(pitch) e.velocity = int(velocity) return e
def populate_midi_track_from_data(mt, data): t = 0 tLast = 0 for d, p, v in data: dt = midi.DeltaTime(mt) dt.time = t - tLast # add to track events mt.events.append(dt) me = midi.MidiEvent(mt) me.type = "NOTE_ON" me.channel = 1 me.time = None # d me.pitch = p me.velocity = v mt.events.append(me) # add note off / velocity zero message dt = midi.DeltaTime(mt) dt.time = d # add to track events mt.events.append(dt) me = midi.MidiEvent(mt) me.type = "NOTE_OFF" me.channel = 1 me.time = None # d me.pitch = p me.velocity = 0 mt.events.append(me) tLast = t + d # have delta to note off t += d # next time # add end of track dt = midi.DeltaTime(mt) dt.time = 0 mt.events.append(dt) me = midi.MidiEvent(mt) me.type = "END_OF_TRACK" me.channel = 1 me.data = '' # must set data to empty string mt.events.append(me) return mt
def noteWrite(miditrack, on, pitch, velocity, channel=1): me = midi.MidiEvent(miditrack) if bool(on) == True: me.type = 'NOTE_ON' elif bool(on) == False: me.type = 'NOTE_OFF' me.channel = channel me.pitch = pitch me.velocity = velocity miditrack.events.append(me)
def process_midi(self, message, deltatime): self._wallclock += deltatime status, note, velocity = message dt = midi.DeltaTime(self.track) dt.time = deltatime * 1000 self.track.events.append(dt) event = midi.MidiEvent(self.track) event.channel = 1 event.pitch = note event.velocity = velocity if status & 0xF0 == NOTE_ON: event.type = "NOTE_ON" self.track.events.append(event) else: event.type = "NOTE_OFF" self.track.events.append(event) stream = midi.translate.midiTrackToStream( self.track).flat.notesAndRests if len(stream) >= seq_len: print("Go Predict", flush=True) self.process_stream(stream[-seq_len:]) self.track = midi.MidiTrack(1)
def eventWrite(miditrack, type, data): me = midi.MidiEvent(miditrack) me.type = type me.data = data miditrack.events.append(me)
def np_seq2mid(np_seq): """ Converts a numpy array to a midi file. :param np_seq: numpy beat sequence :return: music21.midi.MidiFile """ mt = midi.MidiTrack(1) t = 0 tlast = 0 for step in np_seq: # onset will be true if at least one trig is > 0.0 # the remaining trigs are added at the same delta time onset = False # we encountered an onset at this step for idx, trig in enumerate(step[:15]): # find the group group = None for index, grp in enumerate(PERC_GROUPS): if idx in grp: group = index if trig > 0.0: vel = int(step[15 + group] * 127) pitch = PERC_MAP[idx] dt = midi.DeltaTime(mt) if onset is False: dt.time = t - tlast else: dt.time = 0 mt.events.append(dt) me = midi.MidiEvent(mt) me.type = "NOTE_ON" me.channel = 10 me.time = None # d me.pitch = pitch me.velocity = vel mt.events.append(me) if onset is False: tlast = t + 6 onset = True if onset is True: # reset onset for the noteoff onset = False # makes the note off now for idx, trig in enumerate(step[:15]): if trig > 0.0: pitch = PERC_MAP[idx] dt = midi.DeltaTime(mt) if onset is False: dt.time = 6 else: dt.time = 0 mt.events.append(dt) me = midi.MidiEvent(mt) me.type = "NOTE_OFF" me.channel = 10 me.time = None # d me.pitch = pitch me.velocity = 0 mt.events.append(me) if onset is False: onset = True t += TICKS_PER_Q / BEAT_DIV # add end of track dt = midi.DeltaTime(mt) dt.time = 0 mt.events.append(dt) me = midi.MidiEvent(mt) me.type = "END_OF_TRACK" me.channel = 1 me.data = '' # must set data to empty string mt.events.append(me) # make midi file mf = midi.MidiFile() mf.ticksPerQuarterNote = TICKS_PER_Q # cannot use: 10080 mf.tracks.append(mt) return mf
def idxsToMidi(idxs, verbose=False): mf = midi.MidiFile() mf.ticksPerQuarterNote = 1024 # The maestro dataset uses the first track to store tempo data, and the second # track to store the actual performance. So follow that convention. tempo_track = midi.MidiTrack(0) track = midi.MidiTrack(1) mf.tracks = [tempo_track, track] tempo = midi.MidiEvent(tempo_track, type=midi.MetaEvents.SET_TEMPO) # temp.data is the number of microseconds per beat (per quarter note) # So to set ticks per millis = 1 (easy translation from time-shift values to ticks), # tempo.data must be 1e3 * 1024, since ticksPerQuarterNote is 1024 (see above) tempo.data = int(1e3 * 1024).to_bytes(3, 'big') end_of_track = midi.MidiEvent(tempo_track, type=midi.MetaEvents.END_OF_TRACK) end_of_track.data = '' tempo_track.events = [ # there must always be a delta time before each event midi.DeltaTime(tempo_track, time=0), tempo, midi.DeltaTime(tempo_track, time=0), end_of_track ] track.events = [midi.DeltaTime(track, time=0)] current_velocity = 0 notes_on = set() errors = {'is_on': 0, 'is_not_on': 0} for idx in idxs: if 0 <= idx < 128: # note-on pitch = idx if pitch in notes_on: if verbose: print(pitch, 'is already on') errors['is_on'] += 1 continue if track.events[-1].type != 'DeltaTime': track.events.append(midi.DeltaTime(track, time=0)) track.events.append(makeNote(track, pitch, current_velocity)) notes_on.add(pitch) elif 128 <= idx < (128 + 128): # note-off pitch = idx - 128 if pitch not in notes_on: if verbose: print(pitch, 'is not on') errors['is_not_on'] += 1 continue if track.events[-1].type != 'DeltaTime': track.events.append(midi.DeltaTime(track, time=0)) track.events.append(makeNote(track, pitch, 0)) notes_on.remove(pitch) elif (128 + 128) <= idx < (128 + 128 + 100): # time-shift t = (1 + idx - (128 + 128)) * 10 if track.events[-1].type == 'DeltaTime': # combine repeated delta times track.events[-1].time += t else: track.events.append(midi.DeltaTime(track, time=t)) else: # velocity current_velocity = (idx - (128 + 128 + 100)) * 4 if verbose: print('remaining notes left on:', notes_on) if track.events[-1].type != 'DeltaTime': track.events.append(midi.DeltaTime(track, time=0)) track.events.append(end_of_track) return mf, errors
def make_event(track, event_type, channel): event = midi.MidiEvent(track) event.type = event_type event.channel = channel return event