def generate(self, length, bars, octave, scale=["C", "D", "E", "G", "A"], instrument=1, rand_length=False,
time_signature=(4, 4), velocity=[64, 64], channel=1, rests=True, rule_number=30):
# create the instrument for the main track
instr = MidiInstrument()
instr.instrument_nr = instrument # MIDI instrument number: http://www.midi.org/techspecs/gm1sound.php
track = containers.Track(instr)
self.set_instrument(instrument)
if not self.initial:
self.initial = [False] * 9
print "Error: initial set empty. Defaulting..."
if rand_length: # start with quarter note as base
length = 4
automata = Engine(rule_number, init_row=self.initial, edge_type=EdgeType.LOOP)
# Index counting for diagnostics
self.counts = dict((n, 0) for n in range(0, len(scale) * 2))
index = 5 # starting value
for b in range(0, (length * bars) / 4):
bar = Bar("C", time_signature)
while bar.space_left() != 0: # runs until we're out of space for notes (e.g. complete bar)
automata.step() # take a step
index = self.get_chosen_note(index, automata.rows[-1])
if rand_length: # if we're randomly generating lengths of notes
length = int(math.pow(2, random.randint(1, 4)))
left = bar.space_left()
space = (
(left - (left % 0.25)) * 16) if left > 0.25 else left * 16 # checks if we have enough space
if space < 16 / length:
length = int(16.0 / space)
if rests and random.randint(0, 20) == 1: # same rest generation
bar.place_rest(16)
continue # skip the rest
name = list(scale)[index if index < 5 else index - 4] # can be used for diagnostics
self.counts[index] += 1 # add to count data
self.notes.append(index)
n = Note(name,
octave=octave if index < 5 else octave + 1)
n.set_velocity(random.randint(velocity[0], velocity[1])) # random velocity, can feel more "real"
n.set_channel(channel) # if we want > 1 instruments we need > 1 channel
bar.place_notes(n, length)
# print self.format_block(automata.rows[-1])
track.add_bar(bar) # add bar to track
self.track = track # set our track object to the newly generated track
# for n in self.counts:
# print str(n) + ": " + str(self.counts[n]) # diagnostics
# print "======="
return self
print "Harmony instrument: " + track2.set_instrument(instr).names[instr] + " ({})".format(instr)
track2 = s.generate(chorus, verse, bridge, track2.track)
b = Bar()
n = Note('C', 2)
n.set_channel(2)
b.place_notes(n, 4)
track2.add_bar(b)
song.add_track(track2)
# END HARMONY #
if False:
bass = MidiInstrument()
bass.instrument_nr = random.randint(1, 104)
basstrack = containers.Track(bass)
print "Bass instrument: " + bass.names[bass.instrument_nr]
for i in range(0, len(s.song_structure.sections) * BAR_NUMBER):
b = Bar()
for i2 in range(0, time_sig[0] / (time_sig[1] / 4)):
n = Note("C" if s.song_structure.sections[i // BAR_NUMBER] != bridge else "A", 3)
n.set_channel(2)
b.place_notes(n, 4)
# b.place_rest(8)
basstrack.add_bar(b)
song.add_track(basstrack)
def set_instrument(self, number):
instr = MidiInstrument()
instr.instrument_nr = number
self.track.instrument = instr
return instr
