def from_analyses(filenames, use_inversions=True):
ttable = dict()
for filename in filenames:
analysis = mreader.from_file(filename)
if analysis:
for a, b in zip(analysis, analysis[1:]):
k1 = a.key
rn1 = a.rn
k2 = b.key
rn2 = b.rn
if not use_inversions:
rn1 = pychord.just_numeral_with_secondary(rn1)
rn2 = pychord.just_numeral_with_secondary(rn2)
if k1 == k2:
if not rn1 in ttable:
ttable[rn1] = []
ttable[rn1].append(rn2)
table = dict()
for s in ttable:
temp = dict()
for t in ttable[s]:
if not t in temp:
temp[t] = 0
temp[t] += 1
total = sum([temp[t] for t in temp])
table[s] = dict()
for t in ttable[s]:
table[s][t] = float(temp[t]) / total
return MarkovModel(table, use_inversions)
def score(self, s, t):
if not self.use_inversions:
s = pychord.just_numeral_with_secondary(s)
t = pychord.just_numeral_with_secondary(t)
if s == t:
return 1
if not t in self.table[s]:
return 0
return self.table[s][t]
def fix_vii_to_V(labels):
result = labels[:]
N = len(result)
for i in range(N):
if i < N - 1:
a = result[i]
b = result[i + 1]
rn1 = a.rn
rn2 = b.rn
srn1 = pychord.just_numeral_with_secondary(rn1)
srn2 = pychord.just_numeral_with_secondary(rn2)
if srn1 == 'V' and srn2 == 'vii':
b.rn = rn1
if srn2 == 'V' and srn1 == 'vii':
a.rn = rn2
result[i] = a
result[i+1] = b
return result
def fix_inversions(labels, es):
result = labels[:]
N = len(result)
for i in range(N):
if i < N - 1:
a = result[i]
b = result[i + 1]
rn1 = a.rn
rn2 = b.rn
srn1 = pychord.just_numeral_with_secondary(rn1)
srn2 = pychord.just_numeral_with_secondary(rn2)
if srn1.lower() == srn2.lower() and not rn1 == rn2:
anotes = es.notes_in_measure(a.measure, a.start, a.stop)
bnotes = es.notes_in_measure(b.measure, b.start, b.stop)
abass = min(anotes, key=lambda x: x.pitch.midi).pitch.midi
bbass = min(bnotes, key=lambda x: x.pitch.midi).pitch.midi
if abass + 6 < bbass or abass == bbass:
b.rn = a.rn
if bbass + 11 < abass and ('64' in rn1 or '6/4' in rn1):
a.rn = b.rn
result[i] = a
result[i+1] = b
return result
def fix_prefixes(labels):
result = labels[:]
N = len(result)
for i in range(N):
if i < N - 1:
a = result[i]
b = result[i + 1]
rn1 = a.rn
rn2 = b.rn
srn2 = pychord.just_numeral_with_secondary(rn2)
if rn1 == 'ii2' and rn2 == 'I':
a.rn = 'I'
if rn1 == 'ii7':
a.rn = 'I6'
result[i] = a
result[i+1] = b
return result
def fix_common_errors(labels, es):
result = labels[:]
N = len(result)
for i in range(N):
if i < N - 1:
a = result[i]
b = result[i + 1]
rn1 = a.rn
rn2 = b.rn
srn2 = pychord.just_numeral_with_secondary(rn2)
if rn2 in ['I', 'I6', 'i', 'i6']:
notes = es.notes_in_measure(a.measure, a.start, a.stop)
ps = set([n.pitch.pitchClass for n in notes])
if (11 + a.key) % 12 in ps:
if rn1 == 'ii':
a.rn = 'viio6'
if rn1 == 'iio65':
a.rn == 'viio43'
result[i] = a
result[i+1] = b
return result