def add_note(self,
note,
time,
duration,
volume=random.randint(85, 100),
channel=0):
self.midi.addNote(self.track, channel, note, time, duration,
volume + random.randrange(-20, 20))
def add_chord(self,
chord,
time,
duration,
volume=random.randint(85, 100),
channel=1):
for j, note in enumerate(chord):
self.midi.addNote(self.track, j % 12, note % 127, time, duration,
volume + random.randrange(-20, 20))
def add_arpeggio(self,
chord,
time,
duration,
volume=random.randint(85, 100),
channel=2):
for j, note in enumerate(chord):
d = j * duration / len(chord)
print('note', note, 'dur', d)
self.midi.addNote(self.track, j % 12, note % 127, time + d,
duration / len(chord),
volume + random.randrange(-20, 20))
def add_notes(self,
notes,
time,
volume=random.randint(85, 100),
channel=2):
d = 0
j = 0
for note, dur in notes:
d += dur
j += 1
print(f"Note {note} dur {dur}")
self.midi.addNote(self.track, j % 12, note % 127, time + d, dur,
volume + random.randrange(-20, 20))
def motif(self, upper=16):
num_parts = random.randint(8, upper)
motif = []
for i in range(num_parts):
sound = self.make_sound(i, p_chord=0.1)
upper = 4
lower = 1
if sound[1] == "arpeggio":
upper = 8
lower = 4
motif.append([
sound,
self.rand_duration(upper=upper,
lower=lower,
allow_partials=False)
])
else:
motif.append(
[sound,
self.rand_duration(upper=upper, lower=lower)])
return motif
def make_notes(self, i):
num_notes = random.randint(4, 16)
notes = []
for j in range(num_notes):
notes.append([self.make_note(i, j), self.rand_duration(upper=2)])
return notes
def chord_progression(self):
num_chords = random.randint(2, 8)
chords = []
for _ in range(num_chords):
chords.append([self.make_chord(), self.rand_duration(upper=8)])
return chords
def rand_duration(self, upper=4, lower=1, allow_partials=True):
if allow_partials and random.random() < 0.5:
return random.choice([0.25, 0.5, 0.75, 1])
else:
return random.randint(lower, upper)