def csv_to_midi(self, fpath):
track = midi.Track()
track.append(midi.SequencerSpecificEvent(tick=0, data=[5, 15, 9, 70, 200]))
track.append(midi.SequencerSpecificEvent(tick=0, data=[5, 15, 6, 71, 101, 110, 101, 114, 97, 108, 32, 77, 73, 68, 73]))
track.append(midi.TrackNameEvent(tick=0, text='Acoustic Grand Piano High', data=[65, 99, 111, 117, 115, 116, 105, 99, 32, 71, 114, 97, 110, 100, 32, 80, 105, 97, 110, 111, 32, 72, 105, 103, 104]))
track.append(midi.ProgramChangeEvent(tick=0, channel=0, data=[0]))
track.append(midi.ControlChangeEvent(tick=0, channel=0, data=[10, 64]))
track.append(midi.ControlChangeEvent(tick=0, channel=0, data=[10, 64]))
track.append(midi.ControlChangeEvent(tick=0, channel=0, data=[10, 64]))
track.append(midi.ControlChangeEvent(tick=0, channel=0, data=[7, 127]))
track.append(midi.ControlChangeEvent(tick=3, channel=0, data=[100, 64]))
track.append(midi.ControlChangeEvent(tick=0, channel=0, data=[101, 64]))
track.append(midi.ControlChangeEvent(tick=0, channel=0, data=[100, 64]))
track.append(midi.ControlChangeEvent(tick=0, channel=0, data=[101, 64]))
track.append(midi.ControlChangeEvent(tick=1, channel=0, data=[6, 12]))
track.append(midi.ControlChangeEvent(tick=0, channel=0, data=[6, 12]))
track.append(midi.ControlChangeEvent(tick=1, channel=0, data=[38, 0]))
track.append(midi.ControlChangeEvent(tick=0, channel=0, data=[38, 0]))
track.append(midi.NoteOnEvent(tick=5, channel=0, data=[67, 69]))
df = pd.read_csv(fpath, index_col=0, names=["Tick", "Data1", "Data2","Evt_Type"], header=0)
nrows = len(df.iloc[:, 0])
for i in range(nrows):
if df.Evt_Type[i] == "p":
evt = midi.events.ProgramChangeEvent(tick=int(df.Tick[i]), data=[int(df.Data1[i]) + 50, int(df.Data2[i])])
track.append(evt)
if df.Evt_Type[i] == "c":
evt = midi.events.ControlChangeEvent(tick=int(df.Tick[i]), data=[int(df.Data1[i]), int(df.Data2[i])])
track.append(evt)
if df.Evt_Type[i] == "n":
evt = midi.events.NoteOnEvent(tick=int(df.Tick[i]), data=[int(df.Data1[i]), int(df.Data2[i])])
track.append(evt)
track.append(midi.events.EndOfTrackEvent())
for t in track:
print(t)
self.tracks_to_mid([track], "output_test.mid")
def generate_audio_track(data, note_phrases, length, instrument=None):
notes = data[0]["note_matrix"]
if instrument is None:
valid_instruments = list(
set(notes.keys()).intersection(note_phrases.keys()))
instrument = random.choice(valid_instruments)
note_mats = [d["note_matrix"][instrument] for d in data]
if len(note_phrases[instrument]) == 0:
return None
phrases = generate_note_sequence(note_phrases[instrument],
note_mats,
length,
tick_max=160)
track = midi.Track()
track.append(midi.TrackNameEvent())
prog = midi.ProgramChangeEvent()
prog.set_value(instrument)
track.append(prog)
for i in xrange(0, len(phrases)):
for j in xrange(0, len(phrases[i]["tick"])):
pitch = phrases[i]["pitch"][j]
velocity = phrases[i]["velocity"][j]
note_type = phrases[i]["type"][j]
tick = phrases[i]["tick"][j]
obj = midi.NoteOnEvent(channel=0)
if note_type == "off":
obj = midi.NoteOffEvent(channel=0)
obj.set_pitch(pitch)
obj.set_velocity(velocity)
obj.tick = tick
track.append(obj)
track.append(midi.EndOfTrackEvent())
return track
def finalize_midi_sequence(ptrn,
name="Track 1",
inst=0,
channel=0,
tsig=(4, 4),
bpm=120):
"""
Makes a geenrated midi sequnce valid for most players
by adding TimeSignature, SetTempo and EndOfTrack events.
"""
has_tsig = False
has_tempo = False
has_end = False
for evnt in utils.evnt_gen(ptrn):
if isinstance(evnt, midi.SetTempoEvent):
has_tsig = True
if isinstance(evnt, midi.TimeSignatureEvent):
has_tempo = True
if isinstance(evnt, midi.EndOfTrackEvent):
has_end = True
if not has_tsig:
ptrn[0].insert(0, midi.TimeSignatureEvent(tick=0))
ptrn[0][0].data[:2] = tsig
ptrn[0][0].data[2:] = 24, 8
if not has_tempo:
ptrn[0].insert(0, midi.SetTempoEvent(tick=0))
ptrn[0][0].set_bpm(bpm)
if not has_end:
ptrn[0].append(midi.EndOfTrackEvent(tick=0))
ptrn[0].insert(0, midi.TrackNameEvent(tick=0, text=name, data=[]))
ptrn[0].insert(
0, midi.ProgramChangeEvent(tick=0, channel=channel, data=[inst]))
return ptrn
def generate_audio_track(notes,length,all_instruments= None):
if all_instruments is None:
instrument = random.choice(notes.keys())
else:
ai = [a for a in all_instruments if a<42 and a>55]
if len(ai)==0:
instrument = random.choice(all_instruments)
else:
instrument = random.choice(ai)
tick = generate_tick_seq(notes[instrument]['tick']['mat'],notes[instrument]['tick']['inds'],length,tick_max=160)
length = len(tick)
pitch = generate_markov_seq(notes[instrument]['pitch']['mat'],notes[instrument]['pitch']['inds'],length)
velocity = generate_markov_seq(notes[instrument]['velocity']['mat'],notes[instrument]['velocity']['inds'],length)
for i in xrange(0,len(velocity)):
if velocity[i]>100:
velocity[i]=100
track = midi.Track()
track.append(midi.TrackNameEvent())
prog = midi.ProgramChangeEvent()
prog.set_value(instrument)
track.append(prog)
for i in xrange(0,length):
on = midi.NoteOnEvent(channel=0)
on.set_pitch(pitch[i])
on.set_velocity(velocity[i])
on.tick = tick[i]
track.append(on)
track.append(midi.EndOfTrackEvent())
return track
def generate_tempo_track(data, length, mpqn=20):
track = midi.Track()
track.append(midi.TrackNameEvent())
track.append(midi.TextMetaEvent())
te = midi.SetTempoEvent()
te.tick = length
te.set_mpqn(mpqn)
track.append(te)
track.append(midi.EndOfTrackEvent())
return track
def generate_tempo_track(tempos,length):
tick = generate_tick_seq(tempos['tick']['mat'],tempos['tick']['inds'],length)
length = len(tick)
mpqn = generate_markov_seq(tempos['mpqn']['mat'],tempos['mpqn']['inds'],length)
track = midi.Track()
track.append(midi.TrackNameEvent())
track.append(midi.TextMetaEvent())
for i in xrange(0,length):
if mpqn[i]!=0:
te = midi.SetTempoEvent()
te.tick = tick[i]
te.set_mpqn(mpqn[i])
track.append(te)
track.append(midi.EndOfTrackEvent())
return track
def notes_only_csv_to_mid(self, fpath):
track = midi.Track()
track.append(midi.SequencerSpecificEvent(tick=0, data=[5, 15, 9, 70, 200]))
track.append(midi.SequencerSpecificEvent(tick=0, data=[5, 15, 6, 71, 101, 110, 101, 114, 97, 108, 32, 77, 73, 68, 73]))
track.append(midi.TrackNameEvent(tick=0, text='Acoustic Grand Piano High', data=[65, 99, 111, 117, 115, 116, 105, 99, 32, 71, 114, 97, 110, 100, 32, 80, 105, 97, 110, 111, 32, 72, 105, 103, 104]))
track.append(midi.ProgramChangeEvent(tick=0, channel=0, data=[0]))
track.append(midi.ControlChangeEvent(tick=0, channel=0, data=[10, 64]))
track.append(midi.ControlChangeEvent(tick=0, channel=0, data=[10, 64]))
track.append(midi.ControlChangeEvent(tick=0, channel=0, data=[10, 64]))
track.append(midi.ControlChangeEvent(tick=0, channel=0, data=[7, 127]))
track.append(midi.ControlChangeEvent(tick=3, channel=0, data=[100, 64]))
track.append(midi.ControlChangeEvent(tick=0, channel=0, data=[101, 64]))
track.append(midi.ControlChangeEvent(tick=0, channel=0, data=[100, 64]))
track.append(midi.ControlChangeEvent(tick=0, channel=0, data=[101, 64]))
track.append(midi.ControlChangeEvent(tick=1, channel=0, data=[6, 12]))
track.append(midi.ControlChangeEvent(tick=0, channel=0, data=[6, 12]))
track.append(midi.ControlChangeEvent(tick=1, channel=0, data=[38, 0]))
track.append(midi.ControlChangeEvent(tick=0, channel=0, data=[38, 0]))
track.append(midi.NoteOnEvent(tick=5, channel=0, data=[67, 69]))
df = pd.read_csv(fpath, index_col=0, names=["Tick", "Data1", "Data2","Evt_Type"], header=0)
nrows = len(df.iloc[:, 0])
oor = False
for i in range(nrows):
tick = int(abs(df.iloc[i, 0]))
d1 = int(abs(df.iloc[i, 1]))
d2 = int(abs(df.iloc[i, 2]))
if tick > 256 or tick < 0 or d1 > 256 or d1 < 0 or d2 > 256 or d2 < 0:
print("Note in position {} out of range".format(str(i)))
break
evt = midi.events.NoteOnEvent(tick=tick, data=[d1, d2])
track.append(evt)
track.append(midi.events.EndOfTrackEvent())
for t in track:
print(t)
self.tracks_to_mid([track], "output_test.mid")
def change_music_to_pattern(music):
music.parse_track_msg()
# music._init_main_trank()
pattern = midi.Pattern()
pattern.resolution = music.get_resolution()
pattern.format = music.get_play_format()
for track in reversed(music.track):
t = midi.Track()
for event in track:
event_tick = int(event[0])
event_event = event[1]
state_code = event_event["state_code"]
if state_code == 255:
if event_event["name"] == 'Set Tempo':
eve = midi.SetTempoEvent(tick=event_tick,
bpm=event_event["bpm"])
elif event_event["name"] == 'Trank Name':
eve = midi.TrackNameEvent(tick=event_tick,
text=event_event["text"])
elif event_event["name"] == 'Copyright Notice':
eve = midi.CopyrightMetaEvent(tick=event_tick,
text=event_event["text"])
elif event_event["name"] == 'SMPTE Offset':
eve = midi.SmpteOffsetEvent(tick=event_tick,
text=event_event["text"])
elif event_event["name"] == 'Time Signature':
eve = midi.TimeSignatureEvent(
tick=event_tick,
numerator=event_event["numerator"],
denominator=event_event["denominator"],
metronome=event_event["metronome"],
thirtyseconds=event_event["thirtyseconds"])
elif event_event["name"] == "End of Track":
eve = midi.EndOfTrackEvent(tick=event_tick)
else:
continue
elif 240 <= state_code <= 254:
# 系统码
eve = midi.SysexEvent()
elif 224 <= state_code <= 239:
# 滑音
eve = midi.PitchWheelEvent(tick=event_tick,
channel=event_event["channel"],
pitch=event_event["pitch"])
elif 208 <= state_code <= 223:
# After Touch
eve = midi.AfterTouchEvent()
elif 192 <= state_code <= 207:
# 乐器转换
eve = midi.ProgramChangeEvent(tick=event_tick,
channel=event_event["channel"],
data=[event_event["program"]])
elif 176 <= state_code <= 191:
# midi控制器
eve = midi.ControlChangeEvent(
tick=event_tick,
channel=event_event["channel"],
data=[event_event["control"], event_event["value"]])
elif 160 <= state_code <= 175:
continue
elif 144 <= state_code <= 159:
# note on
eve = midi.NoteOnEvent(tick=event_tick,
channel=event_event["channel"],
velocity=event_event["velocity"],
pitch=event_event["pitch"])
elif 128 <= state_code <= 143:
# note off
eve = midi.NoteOffEvent(tick=event_tick,
channel=event_event["channel"],
velocity=event_event["velocity"],
pitch=event_event["pitch"])
elif state_code <= 127:
continue
t.append(eve)
pattern.append(t)
return pattern
def numpy2midi(n):
"""Convert a numpy array n to a midi pattern in python-midi
format, quantised etc."""
# print(n)
# print(n.shape)
resolution = 4
p = midi.Pattern(resolution=resolution) #, tick_relative=False)
track = midi.Track()
#track = midi.Track(tick_relative=False)
p.append(track)
set_tempo = midi.SetTempoEvent()
set_tempo.set_bpm(120)
set_tempo.set_mpqn(120)
track_name = midi.TrackNameEvent(trackname="Track name")
time_sig = midi.TimeSignatureEvent()
time_sig.set_numerator(4)
time_sig.set_denominator(4)
time_sig.set_metronome(180)
# time_sig.set_thirtyseconds(32)
end = midi.EndOfTrackEvent()
end.tick = nsteps * resolution
#track.append(set_tempo)
#track.append(track_name)
#track.append(time_sig)
for step in range(nsteps):
tick = 0
for drum in range(len(names)):
# print(n[drum, step])
if n[drum, step] > 0:
on = midi.NoteOnEvent()
on.channel = 9
on.pitch = dm2[drum]
on.velocity = int(n[drum, step])
on.tick = tick
track.append(on)
# print(on)
tick = 0
tick = resolution
for drum in range(len(names)):
if True:
#elif step > 0 and n[drum, step-1] > 0:
off = midi.NoteOffEvent()
off.channel = 9
off.pitch = dm2[drum]
off.velocity = 100
off.tick = tick
track.append(off)
# print(off)
tick = 0
track.append(end)
#p.make_ticks_rel()
return p
def writemidi( self, filedir="" ):
# sort the events by absoluteticks
# put all tempo, time signature data in track 0, as well as any instrument or track names
# first grab the track name
if self.texts[0][0].text != "":
trackname = MIDI.TrackNameEvent(text=self.texts[0][0].text, tick=0)
trackname.absoluteticks = 0
# for some reason, the data doesn't get through via the text above.
trackname.data = [ ]
i = 0
while i < len(self.texts[0][0].text):
trackname.data.append( ord( self.texts[0][0].text[i] ) )
i+= 1
tracks = [[ trackname]]
del trackname # so that when we reuse this variable later it doesn't change the above
else:
tracks = [[]]
# put all tempo, time signature data in track 0
tracks[0] += self.texts[0][1:] + self.tempos+self.timesignatures+self.notes[0]
# sort everything
tracks[0].sort(key=operator.attrgetter('absoluteticks'))
# then grab the instrument
if self.channels[0] != 9 and self.instruments[0]:
tracks[0].insert(0, MIDI.ProgramChangeEvent( value=self.instruments[0],
channel=self.channels[0] ) )
for i in range(1,len(self.notes)):
# sort each track separately
# first grab the track name
if self.texts[i][0].text != "":
trackname = MIDI.TrackNameEvent(text=self.texts[i][0].text, tick=0)
# for some reason, the data doesn't get through via the text above.
trackname.data = [ ]
trackname.absoluteticks = 0
j = 0
while j < len(self.texts[i][0].text):
trackname.data.append( ord( self.texts[i][0].text[j] ) )
j += 1
tracks.append( [ trackname ] )
del trackname # so that when we reuse this variable later it doesn't change the above
else:
tracks.append( [] )
# then grab the instrument
tracks[i] += self.texts[i][1:] + self.notes[i]
tracks[i].sort(key=operator.attrgetter('absoluteticks'))
if self.channels[i] != 9 and self.instruments[i]:
tracks[i].insert(0, MIDI.ProgramChangeEvent( value=self.instruments[i],
channel=self.channels[i] ))
# now that everything is sorted globally,
# make sure that the local ticks are correct.
tickdivisor = config.EDITresolution
for i in range(len(tracks)):
tracks[i].insert(0, MIDI.ControlChangeEvent( tick=0, channel=self.channels[i],
data=[7,127]) )
for track in tracks:
previouseventabsoluteticks = 0
for event in track:
try:
thiseventabsoluteticks = int(event.absoluteticks)
except AttributeError:
thiseventabsoluteticks = 0
# number of ticks between previous event and the current event
tickmeoff = thiseventabsoluteticks - previouseventabsoluteticks
event.tick = tickmeoff
# check to see how small we can get the resolution
tickdivisor = gcd( tickdivisor, tickmeoff )
# set up the ticks for next event
previouseventabsoluteticks = thiseventabsoluteticks
if config.EDITresolution % tickdivisor:
Error(" min RESOLUTION does not divide our EDITresolution. something is funky ")
# prep the new pattern for creating
newpattern = MIDI.Pattern( resolution=config.EDITresolution/tickdivisor )
for track in tracks:
if tickdivisor > 1:
for event in track:
# divide up the relative ticks
event.tick /= tickdivisor
# keep absolute ticks in the EDITresolution
if track[-1].name != "End of Track":
# add an end of track if it isn't there
track.append( MIDI.EndOfTrackEvent( tick=config.EDITresolution/tickdivisor ) )
newpattern.append( MIDI.Track(track) )
if filedir == "":
MIDI.write_midifile(self.midifile, newpattern)
else:
MIDI.write_midifile(filedir, newpattern)
def writemidi(self, filedir=""):
# sorteer de events van abs ticks
# gooit alle tracks en time signatures in track [0]
# pak de track naam
if self.texts[0][0].text != "":
trackname = MIDI.TrackNameEvent(text=self.texts[0][0].text, tick=0)
trackname.absoluteticks = 0
# dunno werkt niet voor een of andere reden
trackname.data = []
i = 0
while i < len(self.texts[0][0].text):
trackname.data.append(ord(self.texts[0][0].text[i]))
i += 1
tracks = [[trackname]]
del trackname # verwijderd de naam als de hierboven genoteerde naam opnieuw wordt gebruikt
else:
tracks = [[]]
# gooi alles in track [0]
tracks[0] += self.texts[0][
1:] + self.tempos + self.timesignatures + self.notes[0]
# sorteer alles
tracks[0].sort(key=operator.attrgetter('absoluteticks'))
# pakt de instrument
if self.channels[0] != 9 and self.instruments[0]:
tracks[0].insert(
0,
MIDI.ProgramChangeEvent(value=self.instruments[0],
channel=self.channels[0]))
for i in range(1, len(self.notes)):
# sorteer de tracks
# pak de track naam
if self.texts[i][0].text != "":
trackname = MIDI.TrackNameEvent(text=self.texts[i][0].text,
tick=0)
# dunno dit werkt niet voor een of andere reden
trackname.data = []
trackname.absoluteticks = 0
j = 0
while j < len(self.texts[i][0].text):
trackname.data.append(ord(self.texts[i][0].text[j]))
j += 1
tracks.append([trackname])
del trackname # verwijderd de naam als de hierboven genoteerde naam opnieuw wordt gebruikt
else:
tracks.append([])
# pak de instrument
tracks[i] += self.texts[i][1:] + self.notes[i]
tracks[i].sort(key=operator.attrgetter('absoluteticks'))
if self.channels[i] != 9 and self.instruments[i]:
tracks[i].insert(
0,
MIDI.ProgramChangeEvent(value=self.instruments[i],
channel=self.channels[i]))
# kijk of de lokale ticks goed zijn
tickdivisor = config.EDITresolution
for i in range(len(tracks)):
tracks[i].insert(
0,
MIDI.ControlChangeEvent(tick=0,
channel=self.channels[i],
data=[7, 127]))
for track in tracks:
previouseventabsoluteticks = 0
for event in track:
try:
thiseventabsoluteticks = int(event.absoluteticks)
except AttributeError:
thiseventabsoluteticks = 0
# aantal ticks in vergelijking tot voorgaande ticks en current ticks
tickmeoff = thiseventabsoluteticks - previouseventabsoluteticks
event.tick = tickmeoff
# om te kijken hoe klein de resolutie is
tickdivisor = gcd(tickdivisor, tickmeoff)
# set de ticks voor de volgende event(midi)
previouseventabsoluteticks = thiseventabsoluteticks
if config.EDITresolution % tickdivisor:
Error(
" min RESOLUTON kan niet gedeeld worden door EDITresolution. er is iets gaande "
)
newpattern = MIDI.Pattern(resolution=config.EDITresolution /
tickdivisor)
for track in tracks:
if tickdivisor > 1:
for event in track:
# deel de relatieve ticks
event.tick /= tickdivisor
# laat abs ticks in de edit resolution
if track[-1].name != "End of Track":
# voeg het einde van een track hier als het er niet is
track.append(
MIDI.EndOfTrackEvent(tick=config.EDITresolution /
tickdivisor))
newpattern.append(MIDI.Track(track))
if filedir == "":
MIDI.write_midifile(self.midifile, newpattern)
else:
MIDI.write_midifile(filedir, newpattern)
def toMidi(gspattern, midiMap=None, folderPath="output/", name=None):
""" Function to write GSPattern instance to MIDI.
Args:
midiMap: mapping used to translate tags to MIDI pitch
folderPath: folder where MIDI file is stored
name: name of the file
"""
import midi
# Instantiate a MIDI Pattern (contains a list of tracks)
pattern = midi.Pattern(tick_relative=False,format=1)
pattern.resolution=getattr(gspattern,'resolution' , 960)
# Instantiate a MIDI Track (contains a list of MIDI events)
track = midi.Track(tick_relative=False)
track.append(midi.TimeSignatureEvent(numerator = gspattern.timeSignature[0],denominator=gspattern.timeSignature[1]))
# obscure events
# timeSignatureEvent.set_metronome(32)
# timeSignatureEvent.set_thirtyseconds(4)
track.append(midi.TrackNameEvent(text= gspattern.name))
track.append(midi.SetTempoEvent(bpm=gspattern.bpm))
# Append the track to the pattern
pattern.append(track)
beatToTick = pattern.resolution
for e in gspattern.events:
startTick = int(beatToTick * e.startTime)
endTick = int(beatToTick * e.getEndTime())
pitch = e.pitch
channel=1
if midiMap:
pitch = midiMap[e.tag[0]]
if midiMap is None:
track.append(midi.NoteOnEvent(tick=startTick, velocity=e.velocity, pitch=pitch,channel=channel))
track.append(midi.NoteOffEvent(tick=endTick, velocity=e.velocity, pitch=pitch,channel=channel))
track.append(midi.EndOfTrackEvent(tick=int(gspattern.duration * beatToTick)))
# make tick relatives
track.sort(key=lambda e:e.tick)
track.make_ticks_rel()
# Save the pattern to disk
if(not os.path.exists(folderPath)) :
os.makedirs(folderPath)
name = name or gspattern.name
name = name or "test"
if not ".mid" in name:
name+=".mid"
exportedPath = os.path.join(folderPath,name)
midi.write_midifile(exportedPath, pattern)
return exportedPath
#write a simplistic example
midi.write_midifile("{}.mid".format(name), pattern)
#write the same example that utileDemo.py writes, but without using pattern repetition
#It was created by copying the output.mid file to the python3-midi folder and cd'ing there
#and using python3-midi for generating the code from an existing binary MIDI file.
#I then pasted the generated code in here
#
#midi.write_midifile("{}.mid".format(name), pattern)
pattern1 = midi.Pattern(format=1, resolution=960, tracks=\
[midi.Track(\
[midi.SetTempoEvent(tick=0, data=[7, 161, 32]),
midi.EndOfTrackEvent(tick=0, data=[])]),
midi.Track(\
[midi.TrackNameEvent(tick=0, text='Treble', data=[84, 114, 101, 98, 108, 101]),
midi.NoteOnEvent(tick=0, channel=0, data=[76, 100]),
midi.NoteOffEvent(tick=960, channel=0, data=[76, 100]),
midi.NoteOnEvent(tick=0, channel=0, data=[74, 100]),
midi.NoteOffEvent(tick=960, channel=0, data=[74, 100]),
midi.NoteOnEvent(tick=0, channel=0, data=[72, 100]),
midi.NoteOffEvent(tick=960, channel=0, data=[72, 100]),
midi.NoteOnEvent(tick=0, channel=0, data=[71, 100]),
midi.NoteOffEvent(tick=960, channel=0, data=[71, 100]),
midi.NoteOnEvent(tick=0, channel=0, data=[69, 100]),
midi.NoteOffEvent(tick=2880, channel=0, data=[69, 100]),
midi.NoteOnEvent(tick=960, channel=0, data=[77, 100]),
midi.NoteOffEvent(tick=960, channel=0, data=[77, 100]),
midi.NoteOnEvent(tick=0, channel=0, data=[76, 100]),
midi.NoteOffEvent(tick=960, channel=0, data=[76, 100]),
midi.NoteOnEvent(tick=0, channel=0, data=[74, 100]),
def write_midifile(melody, chords, pattern, filename):
beat = 4
def get_chord_pitches(chord):
base = chord_base[chord[0]]
if 'm' in chord:
return (base, base + 3, base + 7)
else:
return (base, base + 4, base + 7)
pattern = copy.deepcopy(pattern)
del pattern[1]
track_melody = midi.Track()
pattern.append(track_melody)
track_melody.append(midi.ProgramChangeEvent(tick=0, value=0, channel=0))
track_melody.append(
midi.TrackNameEvent(tick=0,
text='Track 1#',
data=[84, 114, 97, 99, 107, 32, 49]))
pre_note = None
for note in melody:
if pre_note != None:
tick = int(
(note.position - pre_note.position) * pattern.resolution)
track_melody.append(
midi.NoteOffEvent(tick=tick, pitch=pre_note.pitch, channel=0))
track_melody.append(
midi.NoteOnEvent(tick=0, velocity=100, pitch=note.pitch,
channel=0))
pre_note = note
track_melody.append(
midi.NoteOffEvent(tick=pattern.resolution * 1,
pitch=pre_note.pitch,
channel=0))
track_melody.append(midi.EndOfTrackEvent(tick=0, channel=0))
track_chord = midi.Track()
pattern.append(track_chord)
track_chord.append(midi.ProgramChangeEvent(tick=0, value=0, channel=1))
track_chord.append(
midi.TrackNameEvent(tick=0,
text='Track 2#',
data=[84, 114, 97, 99, 107, 32, 49],
channel=1))
pre_chord = None
for chord in chords:
if pre_chord != None:
tick = int((chord[0] - pre_chord[0]) * pattern.resolution)
track_chord.append(
midi.NoteOnEvent(tick=tick, velocity=0, pitch=0, channel=1))
for pitch in get_chord_pitches(pre_chord[1]):
track_chord.append(
midi.NoteOnEvent(tick=0,
velocity=0,
pitch=pitch,
channel=1))
for pitch in get_chord_pitches(chord[1]):
track_chord.append(
midi.NoteOnEvent(tick=0, velocity=80, pitch=pitch, channel=1))
pre_chord = chord
for i, pitch in enumerate(get_chord_pitches(pre_chord[1])):
track_chord.append(
midi.NoteOnEvent(tick=pattern.resolution * beat if i == 0 else 0,
velocity=0,
pitch=pitch,
channel=1))
track_chord.append(midi.EndOfTrackEvent(tick=0, channel=1))
midi.write_midifile(filename, pattern)