Fix test: update Synth enum count 42 → 46

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

test_pytheory.py

@@ -5333,7 +5333,7 @@ def test_supersaw_wave():
 @needs_portaudio
 def test_all_synths_in_enum():
     from pytheory.play import Synth
-    assert len(Synth) == 42
+    assert len(Synth) == 46
     for s in Synth:
         wave = s(440, n_samples=1000)
         assert len(wave) == 1000
@@ -7155,7 +7155,7 @@ def test_score_system_propagates():
 
 def test_synth_enum_count():
     from pytheory.play import Synth
-    assert len(Synth) == 42
+    assert len(Synth) == 46
 
 
 def test_all_synths_render_and_enum_match():