Soloing

generator/solo/arrangement.py

@@ -84,7 +84,7 @@ def backing(baseline, foreground, part, rhythms, references, choices, initial=No
   generator.model.validate_document(document)
   return document['staves'][0]['measures']
 
-def apply(source, parts, *, rhythms, scales, sequences):
+def apply(source, parts, *, rhythms, scales, sequences, solos=None):
   """Compose once per song, replacing only already-placed solo section windows."""
   analysis = generator.solo.analysis.analyze(source)
   sections = regions(source)
@@ -103,6 +103,8 @@ def apply(source, parts, *, rhythms, scales, sequences):
       if sounding:
         cutoff -= generator.model.fraction(pickup['duration']) - min(sounding)
     solo = generator.solo.composer.compose(analysis, template, part, cutoff, scales=scales, sequences=sequences, rhythms=rhythms, initial=initial)
+    if solos is not None:
+      solos.append(solo)
     foreground = generator.solo.notation.measures(template, solo.notes(), 'solo_' + part)
     generator.solo.notation.replace_region(parts[part], first, foreground)
     annotate(parts[part], solo, offset)