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Chord Families

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khodowany
2026-10-06 02:57:37 -05:00
parent df83cae38c
commit e71385dad1
16 changed files with 590 additions and 126 deletions
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generator/vocabulary.py
+34 -8
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@@ -23,18 +23,40 @@ def _load(contents):
result = {}
for name, text in contents:
value = json.loads(text)
if value.get('version') != (2 if name == 'accompaniment' else 1) or not value.get('provenance') or not value.get('license'):
if value.get('version') != (3 if name == 'accompaniment' else 1) or not value.get('provenance') or not value.get('license'):
raise ValueError(f'{name}: unsupported or unprovenanced production vocabulary')
if name == 'accompaniment':
if fractions.Fraction(value['grid']) != fractions.Fraction(1, 2):
raise ValueError('accompaniment requires an eighth-note placement grid')
for lane in ('electric', 'bass', 'upper'):
layer = value['layers'][lane]
if not 0 <= layer['attacks'][0] <= layer['attacks'][1] <= 3 or not layer['families']:
raise ValueError('invalid accompaniment attack range or duration families')
for family in layer['families']:
if not value['families'][family] or any(fractions.Fraction(d) <= 0 for d in value['families'][family]):
raise ValueError('accompaniment durations must be positive')
for part, lanes in (('electric', ('electric',)), ('acoustic', ('bass', 'upper'))):
policy = value['instruments'][part]
if fractions.Fraction(policy['attack_spacing']) < fractions.Fraction(1, 2):
raise ValueError('accompaniment attacks must be at least an eighth apart')
for lane in lanes:
layer = policy['layers'][lane]
if not 0 <= layer['attacks'][0] <= layer['attacks'][1] <= 3 or not layer['families']:
raise ValueError('invalid accompaniment attack range or duration families')
for family in layer['families']:
durations = policy['families'][family]
if not durations or any(fractions.Fraction(d) <= 0 for d in durations):
raise ValueError('accompaniment durations must be positive')
if part == 'acoustic' and any(fractions.Fraction(d) not in (fractions.Fraction(1, 2), 1) for d in durations):
raise ValueError('acoustic rhythm uses quarter and eighth notes')
families = policy['voicing_families']
if not families.get('provenance'):
raise ValueError('guitar voicing families require provenance')
if part == 'electric':
if set(families['rank']) != {'drop-two', 'close-position', 'compact-open', 'compact-doubled', 'three-note-shell'} or any(type(v) is not int or not 0 <= v <= 2 for v in families['rank'].values()):
raise ValueError('invalid electric family ranking')
else:
if set(map(fractions.Fraction, policy['allowed_durations'])) != {fractions.Fraction(1, 2), fractions.Fraction(1)} or policy['connect_holds']:
raise ValueError('acoustic rhythm must retain short quarter/eighth attacks')
for kind in ('triad', 'tetrad', 'extended'):
if set(families[kind]) != {'5/1', '5/5', '6/1', '6/5'}:
raise ValueError('acoustic families require root/fifth bass on both bass strings')
for orders in families[kind].values():
if not orders or any(len(o) != 3 or set(o) - {'root', 'fifth', 'guide', 'terminal', 'color'} for o in orders):
raise ValueError('invalid acoustic upper chord order')
if not 1 <= value['lane_candidates'] <= 64 or not 1 <= value['measure_candidates'] <= 64:
raise ValueError('accompaniment candidate budgets must be 1–64')
entries = value.get('cells', value.get('patterns', value.get('colors', value.get('transformations', []))))
@@ -53,6 +75,10 @@ def current():
def data(name):
return current()['data'][name]
def accompaniment(part, resources=None):
value = (resources or current()['data'])['accompaniment']
return {**{k: v for k, v in value.items() if k != 'instruments'}, **value['instruments'][part]}
def role(name=None):
active = current()
name = name or active['role']