def generate_hypercube_progression(chrd):
bin_note_ints = chord_to_binary(chrd)
note_ints = bin_to_note_ints(bin_note_ints)
path = get_hypercube_neighbor_path(note_ints)
if len(path):
return ChordProgression(path)
else:
return ChordProgression([])
def get_chord_prog(bs, transpose=0):
"""コード進行取得、移調する（オプション）"""
cp = ChordProgression([
elem.text.replace('♭', 'b').replace('maj', 'M')
for elem in bs.select('span ruby rt')
if elem.text not in ('N.C', 'N.C.')
])
cp.transpose(transpose)
return ' '.join([str(c) for c in cp])
def test_self_add(self):
cp1 = ChordProgression(["C", "F", "G"])
cp2 = ChordProgression(["Am", "Em"])
cp1 += cp2
self.assertEqual(len(cp1), 5)
self.assertEqual(
cp1.chords,
[Chord("C"),
Chord("F"),
Chord("G"),
Chord("Am"),
Chord("Em")])
def chord_transpose(chords, step):
"""Function that tranposes the chords by specified step amount
Args:
chords (list): List of chords to transpose
step (int): The number of steps to transpose up (positive integer) or down (negative integer)
Returns:
list: tuple containing list of original chords and list of transposed chords
"""
original_chords = ChordProgression(chords)
transposed_chords = ChordProgression(chords)
transposed_chords.transpose(step)
return original_chords, transposed_chords
def test_set_item(self):
cp = ChordProgression(["C", "F", "G"])
cp[1] = Chord("E")
self.assertEqual(cp[0], Chord("C"))
self.assertEqual(cp[1], Chord("E"))
self.assertEqual(cp[2], Chord("G"))
self.assertEqual(len(cp), 3)
def generate_chord_progression(mdl,
starting_chord,
length,
max_memory=4,
random_neighbors=False):
progression = ChordProgression(Chord(starting_chord))
current_chord = starting_chord
memory = []
top_k = 10
if max_memory > 0:
memory = [current_chord]
for i in range(0, length):
next_chord = current_chord
# print("current_chord: ", current_chord)
neighbors = mdl.get_nearest_neighbors(next_chord, top_k)
neighbor_chords = [n[1] for n in neighbors]
# print("\tneighbors:", neighbor_chords)
# choose random neighbor
if random_neighbors:
processed_neighbors = np.random.choice(neighbor_chords, top_k)
else:
processed_neighbors = neighbor_chords
if len(processed_neighbors):
# choose sequential neighbors
for neighbor in processed_neighbors:
if neighbor != next_chord and neighbor not in memory:
next_chord = neighbor
memory.append(next_chord)
if len(memory) >= max_memory:
memory.pop(0) # remove first element
# random_neighbors = np.random.choice(neighbor_chords, 1)
# print("\trandom_neighbors: ", random_neighbors)
# next_chord = random_neighbors[0]
current_chord = next_chord
if current_chord:
chrd = Chord(current_chord)
progression.append(chrd)
return progression
def main():
args = parse_args()
chords = ChordProgression(args.chord)
player = Player()
player.open_stream()
synthesizer = Synthesizer(osc1_waveform=Waveform.triangle,
osc1_volume=1.0,
use_osc2=False)
for chord in chords:
notes = chord.components_with_pitch(root_pitch=3)
print("Play {}".format(chord))
player.play_wave(synthesizer.generate_chord(notes, 1.0))
def get_chord_progression_from_file(f_name, debug=False):
"""
Takes a file name returns a chord progression
:return ChordProgression
"""
if debug:
print("processing: {}".format(f_name))
mlt = Multitrack()
try:
mlt.parse_midi(filename=f_name, binarized=True)
merged_mlt = mlt.get_merged_pianoroll(mode='max')
except:
print("unable to parse. skipping: {}".format(f_name))
return ChordProgression() # empty progression
chord_progression = ChordProgression([])
last_chord_change = 0
for i, x in enumerate(merged_mlt):
# print(x)
notes = np.where(x)
num_notes = np.sum(x)
if num_notes:
if num_notes > 1:
chord_notes = INT_TO_NOTE[notes[0] % 12]
chord_name = note_to_chord(chord_notes.tolist())
if chord_name:
chord = chord_name[0]
if len(chord_progression.chords
) == 0 or chord_progression.chords[-1] != chord:
# print("chord: ", notes[0], chord_notes, chord_name)
chord_progression.append(chord)
# else:
# print("note: ", notes[0])
# print(chord_progression)
return chord_progression
def test_transpose(self):
cp = ChordProgression(["C", "F", "G"])
cp.transpose(3)
self.assertEqual(cp.chords, [Chord("Eb"), Chord("Ab"), Chord("Bb")])
def test_pop(self):
cp = ChordProgression(["C", "D", "E"])
c = cp.pop()
self.assertEqual(len(cp), 2)
self.assertEqual(c, Chord("E"))
def test_insert(self):
cp = ChordProgression(["C", "D", "E"])
cp.insert(0, "F")
self.assertEqual(len(cp), 4)
self.assertEqual(cp.chords[0], Chord("F"))
def test_append(self):
cp = ChordProgression(["C", "D", "E"])
cp.append("F")
self.assertEqual(len(cp), 4)
self.assertEqual(cp.chords[-1], Chord("F"))
def test_multiple_chords_str(self):
c1 = "C"
c2 = "D"
cp = ChordProgression([c1, c2])
self.assertEqual(cp.chords, [Chord(c1), Chord(c2)])
def test_multiple_chords(self):
c1 = Chord("C")
c2 = Chord("D")
cp = ChordProgression([c1, c2])
self.assertEqual(cp.chords, [c1, c2])
def test_one_chord_list_str(self):
c = "C"
cp = ChordProgression([c])
self.assertEqual(cp.chords, [Chord(c)])
def test_get_item(self):
cp = ChordProgression(["C", "F", "G"])
self.assertEqual(cp[0], Chord("C"))
self.assertEqual(cp[1], Chord("F"))
self.assertEqual(cp[-1], Chord("G"))
def test_one_chord_invalid_type(self):
c = 1
with self.assertRaises(TypeError):
ChordProgression(c)
def test_invalid_eq(self):
cp = ChordProgression(["C", "F", "G"])
with self.assertRaises(TypeError):
print(cp == 0)
def test_eq(self):
cp1 = ChordProgression(["C", "F", "G"])
cp2 = ChordProgression(["C", "F", "G"])
self.assertEqual(cp1, cp2)
self.assertIsNot(cp1, cp2)
def test_slice(self):
cp = ChordProgression(["C", "F", "G"])
self.assertEqual(cp[0:1], [Chord("C")])
self.assertEqual(cp[1:], [Chord("F"), Chord("G")])
self.assertEqual(cp[0::2], [Chord("C"), Chord("G")])
def test_none(self):
cp = ChordProgression()
self.assertEqual(cp.chords, [])
"G": 7,
"G#": 8,
"Ab": 8,
"A": 9,
"A#": 10,
"Bb": 10,
"B": 11
}
intervals = [
"unison", "m2", "maj2", "m3", "maj3", "p4", "tritone"
"p5", "m6", "maj6", "m7", "maj7"
] # to index
# sample chord progression
testprog = ["Am7", "Cmaj7", "Fmaj7", "Em7"]
prog = ChordProgression(testprog)
chordnotes = [p.components_with_pitch(4) for p in prog]
tur = turtle.Turtle()
turtle.hideturtle() # hide turtle arrow
for i, chord in enumerate(chordnotes):
indices = []
for note in chord:
index = chromatic[
note[:-1]] # get the note and its index for interval purposes
indices.append(index)
ints = []
for j, ind in enumerate(indices):
if j == 0:
pass
def test_one_chord_list(self):
c = Chord("C")
cp = ChordProgression([c])
self.assertEqual(cp.chords, [c])