Fix Playability

tests/test_chord_families.py

@@ -78,11 +78,13 @@ class ChordFamilies(unittest.TestCase):
           return min(p.string_number for p in v if p.midi == midi)
         tier = generator.fretboard.span_penalty(choices[0])
         self.assertEqual(top_string(choices[0]), min(top_string(v) for v in choices if generator.fretboard.span_penalty(v) == tier))
-        self.assertEqual(max(p.midi for p in choices[0]), midi)
+        self.assertTrue(all(tuple(p.string_number for p in v) in ((3, 2, 1), (4, 3, 2, 1)) for v in choices))
         self.assertTrue(all(p.string_number in (1, 2, 3, 4) for v in choices for p in v))
         self.assertTrue(all(midi in {p.midi for p in v} for v in choices))
     low = tests.test_voicing.ranked('C7', (64,))[0]
-    self.assertEqual(tuple(p.string_number for p in low), (4, 3, 2))
+    self.assertIn(1, {p.string_number for p in low})
+    self.assertIn(64, {p.midi for p in low})
+    self.assertGreater(max(p.midi for p in low), 64)
   def test_acoustic_policy_change_does_not_reseed_electric_roles(self):
     resources = generator.vocabulary.load()
     changed = copy.deepcopy(resources)