AudioToolbox macOS xcode27.0 b4

#AudioToolbox.framework https://github.com/dotnet/macios/pull/26271

diff -ruN /Applications/Xcode_27.0.0-beta3.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX.sdk/System/Library/Frameworks/AudioToolbox.framework/Headers/AudioUnitParameters.h /Applications/Xcode_27.0.0-beta4.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX.sdk/System/Library/Frameworks/AudioToolbox.framework/Headers/AudioUnitParameters.h
--- /Applications/Xcode_27.0.0-beta3.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX.sdk/System/Library/Frameworks/AudioToolbox.framework/Headers/AudioUnitParameters.h	2026-06-27 19:31:43
+++ /Applications/Xcode_27.0.0-beta4.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX.sdk/System/Library/Frameworks/AudioToolbox.framework/Headers/AudioUnitParameters.h	2026-07-11 01:32:18
@@ -1081,6 +1081,8 @@
 	kReverb2Param_DecayTimeAtNyquist				= 5,
 		// Global, Integer, 1->1000
 	kReverb2Param_RandomizeReflections				= 6,
+		// Global, Boolean, 0->1, 1
+	kReverb2Param_LegacyMode						= 7,
 };
 
 #endif //AudioUnit_AudioUnitParameters_h