def change(num, key, mode, count=3):
"""
change the chord from number to str.
example: in C major, 1 change to ['C', 'E', 'G']
:param num: the progression number, should be int from 1~7.
:param key: char, the first note of scale，could be C D E F G A B.
:param mode: see doc of class Impromptu.
:param count: default 3, could be 3, 4 or 5, corresponding triad， seventh chord and hord of the ninthc.
:return:
"""
d = {'C': 1, 'D': 2, 'E': 3, 'F': 4, 'G': 5, 'A': 6, 'B': 7}
result = []
try:
if type(num) == int and 0 < num < 8:
s = musthe.Scale(musthe.Note(key), mode)
scale = []
for i in range(len(s)):
scale.append(str(s[i]))
for i in range(count):
result.append(d[scale[(num - 1 + 2 * i) % 7]])
else:
raise TypeError('num should be int from 1~7.')
except NameError:
return change(num, key, mode='aeolian', count=count)
return result
def set_opt(self,
scale: str = 'B2 major',
duration: float = 0.08,
show_notes: bool = False,
randomize: bool = False,
time_between_notes: float = None,
show_notes_template: str = '{name} ({freq})'):
"Populate config based on given args"
if scale in {None, 'all', 'ALL'}:
# use all available notes
scale = musthe.Note.all(min_octave=2,
max_octave=6) # not too high, it hurts
else: # valid input: use given scale
scale_root, scale_type = scale.split(' ') if ' ' in scale else (
scale, 'major')
scale = musthe.Scale(scale_root.upper(), scale_type.lower())
if randomize:
scale = list(scale)
random.shuffle(scale)
else: # sort by making very different notes succeeding each others
scale = list(scale)
scale = tuple(scale[idx] for idx in right_left_walk(len(scale)))
scale = tuple(scale)
return {
'scale': scale,
'notes': iter(scale),
'duration': float(duration),
'show_notes': bool(show_notes),
'time_between_notes': time_between_notes,
'show_notes_template': str(show_notes_template),
}
def get_scale_idx(note, key):
scale = theory.Scale(key[0], key[1])
for i in range(7):
# print scale.__getitem__(i)
if scale.__getitem__(i).letter.__eq__(theory.Note(note).letter):
return i + 1
raise ValueError("note ", note, " not in scale ", key)
def chord_translate(chord_str: str,
scale: int,
base_oct: int = 3) -> List[str]:
chord_str = chord_str.replace("(", "").replace(")", "")
try:
chord = pychord.Chord(chord_str)
addomit = dict()
except ValueError as e:
# add omit だけ抜き取りたい
chord_without_quality = re.sub(f"^{note}", "", chord_str)
valid_qualities = list(pychord.quality.QUALITY_DICT.keys())
valid_qualities.remove("")
valid_qualities.sort(key=len, reverse=True)
found = False
addomit_str = ""
for quality in valid_qualities:
if chord_without_quality.find(quality) == 0: # 先頭のコードqualityを削除する
found = True
addomit_str = re.sub(f"^{re.escape(quality)}", "",
chord_without_quality)
chord = pychord.Chord(
re.sub(f"{re.escape(addomit_str)}$", "", chord_str))
break
if not found:
raise e
# TODO: Fix this
# Should raise error if removed addomit_str is not empty
addomit = {
"adds":
[r.groups()[-2:] for r in re.finditer(add_regex, addomit_str)],
"omits":
[r.groups()[-1] for r in re.finditer(omit_regex, addomit_str)],
}
if len(addomit) > 0:
s = musthe.Scale(f"{chord.root}3", "major")
adds = addomit.get("adds")
omits = addomit.get("omits")
for add in adds:
align = (add[0].count("#") + add[0].count("+") -
add[0].count("b") - add[0].count("-"))
adder_note_dict = parse_note_str(
transpose(s[int(add[1]) - 1].scientific_notation(), align))
chord.quality.append_note(adder_note_dict["note"], chord._root,
int(adder_note_dict["oct"]) - 3)
for omit in omits:
for o in range(int(omit) - 2, int(omit) + 1):
if o in chord.quality.components:
chord.quality.components.remove(o)
chord.transpose(scale)
notes = chord.components_with_pitch(base_oct)
return notes
def build_chord(num, key):
# print "\n\nBUILDING CHORD: ", num, " chord in ", key
scale = theory.Scale(key[0], key[1])
letter = scale[num - 1]
if key[1] == 'major':
ending = major_chords[num - 1]
if key[1] == 'harmonic_minor':
ending = minor_chords[num - 1]
# print "\nChord is ", letter, ending, '\n\n'
return str(letter) + ending
def get_chord_in_scale(idx, key):
scale = theory.Scale(key[0], key[1])
root = scale[(idx - 1) % 7]
if key[1] == 'major':
#return theory.Chord(root, major_chords[idx-1])
return idx
if key[1] == 'harmonic_minor':
#return theory.Chord(root, minor_chords[idx-1])
return idx
def get_chord_options(note, key):
scale = theory.Scale(theory.Note(key[0]), key[1])
scale_idx_1 = get_scale_idx(note, key)
scale_idx_2 = scale_idx_1 - 2
scale_idx_3 = scale_idx_1 - 4
options = [scale_idx_1, scale_idx_2, scale_idx_3]
for i in range(len(options)):
if options[i] <= 0:
options[i] += 7
# print "chord options are ", sorted(options)
return sorted(options)
def get_notes(path, key):
tree = ET.parse(path)
root = tree.getroot()
scale = theory.Scale(key[0], key[1])
P1 = root.find('part')
all_notes = []
for measure in P1:
for note in measure.findall('note'):
if note.find('accidental') is not None:
raise ValueError(
'\n\nWARNING: sorry mate, no notes outside the key signature for now. check back soon...\n\n'
)
elif note.find('pitch') is not None:
for i in range(7):
if scale[i].letter == note.find('pitch').find('step').text:
all_notes.append(
str(scale[i].letter) + str(scale[i].accidental))
return all_notes
def harmonic_random(reffile):
chords = []
lf = open(reffile)
nf = open(reffile)
for line in lf:
label, value, time = line.split()
if random.randint(1,10) <= 3:
continue
time = datetime.strptime(time, '%H:%M:%S.%f')
chord = gen_rand_chord()
chords.append((pychord.Chord(chord), time))
chord_groups = [[] for c in chords]
for line in nf:
label, value, time = line.split()
if label != 'NOTE':
continue
time = datetime.strptime(time, '%H:%M:%S.%f')
if time < chords[0][1]:
continue
for i in range(len(chords)-1):
if chords[i][1] <= time < chords[i+1][1]:
chord_groups[i].append(value[:-1])
break
else:
assert chords[-1][1] <= time
chord_groups[-1].append(value[:-1])
bad_notes = 0
total_notes = 0
for i in range(len(chords)):
chord = chords[i][0]
notes = chord_groups[i]
quality = chord.quality.quality
if quality in major_quals:
quality = 'major'
elif quality in minor_quals:
quality = 'natural_minor'
else:
quality = None
if quality:
scale = musthe.Scale(musthe.Note(chord.root), quality)
scale_notes = [str(scale[i]) for i in range(len(scale))]
else:
scale = []
for i in range(len(notes)):
lower = max(0, i-HARMONIC_WINDOW)
upper = min(len(notes)-1, i+HARMONIC_WINDOW)
relevant_notes = [notes[j] for j in range(lower, upper+1)]
for note in relevant_notes:
if note in chord.components():# or musthe.Note(note) in scale:
break
else:
bad_notes += 1
total_notes += len(notes)
# print('{:>8}'.format(f'{bad_notes}/{total_notes}\t'), end='')
# print(f'{bad_notes/total_notes*100:.0f}% error')
return bad_notes / total_notes