diff -ruN /Applications/Xcode_26.5.0.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX.sdk/System/Library/Frameworks/AVFAudio.framework/Headers/AVAudioConnectionPoint.h /Applications/Xcode_27.0.0-beta.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX.sdk/System/Library/Frameworks/AVFAudio.framework/Headers/AVAudioConnectionPoint.h
--- /Applications/Xcode_26.5.0.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX.sdk/System/Library/Frameworks/AVFAudio.framework/Headers/AVAudioConnectionPoint.h	2026-04-18 23:16:03
+++ /Applications/Xcode_27.0.0-beta.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX.sdk/System/Library/Frameworks/AVFAudio.framework/Headers/AVAudioConnectionPoint.h	2026-05-22 08:28:50
@@ -19,7 +19,7 @@
 	
 		Instances of this class are immutable.
 */
-API_AVAILABLE(macos(10.11), ios(9.0), watchos(2.0), tvos(9.0))
+NS_SWIFT_SENDABLE API_AVAILABLE(macos(10.11), ios(9.0), watchos(2.0), tvos(9.0))
 @interface AVAudioConnectionPoint : NSObject {
 @private
 	AVAudioNode *_node;
diff -ruN /Applications/Xcode_26.5.0.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX.sdk/System/Library/Frameworks/AVFAudio.framework/Headers/AVAudioConverter.h /Applications/Xcode_27.0.0-beta.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX.sdk/System/Library/Frameworks/AVFAudio.framework/Headers/AVAudioConverter.h
--- /Applications/Xcode_26.5.0.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX.sdk/System/Library/Frameworks/AVFAudio.framework/Headers/AVAudioConverter.h	2026-04-18 21:41:01
+++ /Applications/Xcode_27.0.0-beta.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX.sdk/System/Library/Frameworks/AVFAudio.framework/Headers/AVAudioConverter.h	2026-05-22 08:25:33
@@ -151,14 +151,13 @@
 		convertToBuffer:error:withInputFromBlock: will return as much output as could be converted
 		with the input already supplied.
 */
-typedef AVAudioBuffer * __nullable (^ NS_SWIFT_SENDABLE AVAudioConverterInputBlock)(AVAudioPacketCount inNumberOfPackets, AVAudioConverterInputStatus* outStatus);
+typedef AVAudioBuffer * __nullable (^ NS_SWIFT_NONSENDABLE AVAudioConverterInputBlock)(AVAudioPacketCount inNumberOfPackets, AVAudioConverterInputStatus* outStatus);
 
 /*!
 	@class AVAudioConverter
 	@abstract
 		Converts streams of audio between various formats.
 */
-NS_SWIFT_SENDABLE
 API_AVAILABLE(macos(10.11), ios(9.0), watchos(2.0), tvos(9.0))
 @interface AVAudioConverter : NSObject {
 @private
@@ -301,7 +300,7 @@
 		It attempts to fill the buffer to its capacity. On return, the buffer's length indicates the number of 
 		sample frames successfully converted.
 */
-- (AVAudioConverterOutputStatus)convertToBuffer:(AVAudioBuffer *)outputBuffer error:(NSError **)outError withInputFromBlock:(AVAudioConverterInputBlock)inputBlock;
+- (AVAudioConverterOutputStatus)convertToBuffer:(AVAudioBuffer *)outputBuffer error:(NSError **)outError withInputFromBlock:(NS_NOESCAPE AVAudioConverterInputBlock)inputBlock;
 
 @end
 
diff -ruN /Applications/Xcode_26.5.0.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX.sdk/System/Library/Frameworks/AVFAudio.framework/Headers/AVAudioEngine.h /Applications/Xcode_27.0.0-beta.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX.sdk/System/Library/Frameworks/AVFAudio.framework/Headers/AVAudioEngine.h
--- /Applications/Xcode_26.5.0.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX.sdk/System/Library/Frameworks/AVFAudio.framework/Headers/AVAudioEngine.h	2026-04-18 19:16:24
+++ /Applications/Xcode_27.0.0-beta.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX.sdk/System/Library/Frameworks/AVFAudio.framework/Headers/AVAudioEngine.h	2026-05-22 05:24:21
@@ -135,9 +135,21 @@
 	In such a case, the client could implement their own synchronization between their realtime
 	and non-realtime threads and retry calling `AVAudioEngineManualRenderingBlock`.
 */
-typedef AVAudioEngineManualRenderingStatus (^AVAudioEngineManualRenderingBlock)(AVAudioFrameCount numberOfFrames, AudioBufferList *outBuffer, OSStatus * __nullable outError) API_AVAILABLE(macos(10.13), ios(11.0), watchos(4.0), tvos(11.0));
+typedef AVAudioEngineManualRenderingStatus (^ NS_SWIFT_NONSENDABLE AVAudioEngineManualRenderingBlock)(AVAudioFrameCount numberOfFrames, AudioBufferList *outBuffer, OSStatus * __nullable outError) API_AVAILABLE(macos(10.13), ios(11.0), watchos(4.0), tvos(11.0));
 
 /*!
+	@typedef		AVMIDIEventListBlock
+	@abstract		A block used by an audio unit to send or receive MIDIEventList data.
+	@param eventSampleTime
+					The time in samples at which the MIDI events are to occur.
+	@param cable
+					The virtual cable number associated with this MIDI data.
+	@param eventList
+					One full MIDI, partial MIDI SysEx, or a full SysEx UMP message.
+*/
+typedef OSStatus (^ NS_SWIFT_NONSENDABLE AVMIDIEventListBlock)(SInt64 eventSampleTime, UInt8 cable, const struct MIDIEventList* eventList) CA_REALTIME_API API_AVAILABLE(macos(27.0), ios(27.0), tvos(27.0), watchos(27.0));
+
+/*!
 	@class AVAudioEngine
 
 	An AVAudioEngine contains a group of connected AVAudioNodes ("nodes"), each of which performs
@@ -157,7 +169,7 @@
 	audio device and rendering in response to requests from the client, normally at or
 	faster than realtime rate.
 */
-API_AVAILABLE(macos(10.10), ios(8.0), watchos(2.0), tvos(9.0))
+NS_SWIFT_SENDABLE API_AVAILABLE(macos(10.10), ios(8.0), watchos(2.0), tvos(9.0))
 @interface AVAudioEngine : NSObject {
 @private
 	void *_impl;
@@ -227,8 +239,37 @@
 	Note that any pre-existing connection(s) involving the source's output bus or the
 	destination's input bus will be broken.
 */
-- (void)connect:(AVAudioNode *)node1 to:(AVAudioNode *)node2 fromBus:(AVAudioNodeBus)bus1 toBus:(AVAudioNodeBus)bus2 format:(AVAudioFormat * __nullable)format;
+- (void)connect:(AVAudioNode *)node1 to:(AVAudioNode *)node2 fromBus:(AVAudioNodeBus)bus1 toBus:(AVAudioNodeBus)bus2 format:(AVAudioFormat * __nullable)format API_DEPRECATED_WITH_REPLACEMENT("connect:to:fromBus:toBus:format:error:", ios(8.0, 27.0), watchos(2.0, 27.0), macos(10.10, 27.0), tvos(9.0, 27.0));
 
+/*! @method connect:to:fromBus:toBus:format:error
+	@abstract
+		Establish a connection between two nodes.
+	@param node1
+		The source node
+	@param node2
+		The destination node
+	@param bus1
+		The output bus on the source node
+	@param bus2
+		The input bus on the destination node
+	@param format
+		If non-nil, the format of the source node's output bus is set to this
+		format. In all cases, the format of the destination node's input bus is set to
+		match that of the source node's output bus.
+	@param error
+		on exit, if an error occurs, a description of the error
+	@return
+		YES for success
+
+	Nodes have input and output buses (AVAudioNodeBus). Use this method to establish
+	one-to-one connections betweeen nodes. Connections made using this method are always
+	one-to-one, never one-to-many or many-to-one.
+
+	Note that any pre-existing connection(s) involving the source's output bus or the
+	destination's input bus will be broken.
+*/
+- (BOOL)connect:(AVAudioNode *)node1 to:(AVAudioNode *)node2 fromBus:(AVAudioNodeBus)bus1 toBus:(AVAudioNodeBus)bus2 format:(AVAudioFormat * __nullable)format error:(NSError**)error NS_SWIFT_NAME(connectNode(_:to:fromBus:toBus:format:)) API_AVAILABLE(macos(27.0), ios(27.0), watchos(27.0), tvos(27.0));
+
 /*!	@method connect:to:format:
 	@abstract
 		Establish a connection between two nodes
@@ -237,8 +278,22 @@
 	and bus 0 on the destination node, except in the case of a destination which is a mixer,
 	in which case the destination is the mixer's nextAvailableInputBus.
 */
-- (void)connect:(AVAudioNode *)node1 to:(AVAudioNode *)node2 format:(AVAudioFormat * __nullable)format;
+- (void)connect:(AVAudioNode *)node1 to:(AVAudioNode *)node2 format:(AVAudioFormat * __nullable)format API_DEPRECATED_WITH_REPLACEMENT("connect:to:format:error:", ios(8.0, 27.0), watchos(2.0, 27.0), macos(10.10, 27.0), tvos(9.0, 27.0));
 
+/*!	@method connect:to:format:error:
+	@abstract
+		Establish a connection between two nodes
+	@param error
+		on exit, if an error occurs, a description of the error
+	@return
+		YES for success
+
+	This calls connect:to:fromBus:toBus:format: using bus 0 on the source node,
+	and bus 0 on the destination node, except in the case of a destination which is a mixer,
+	in which case the destination is the mixer's nextAvailableInputBus.
+*/
+- (BOOL)connect:(AVAudioNode *)node1 to:(AVAudioNode *)node2 format:(AVAudioFormat * __nullable)format error:(NSError**)error NS_SWIFT_NAME(connectNode(_:to:format:)) API_AVAILABLE(macos(27.0), ios(27.0), watchos(27.0), tvos(27.0));
+
 /*! @method connect:toConnectionPoints:fromBus:format:
 	@abstract
 		Establish connections between a source node and multiple destination nodes.
@@ -274,8 +329,49 @@
 		- any AVAudioUnitTimeEffect
 		- any sample rate conversion
 */
-- (void)connect:(AVAudioNode *)sourceNode toConnectionPoints:(NSArray *)destNodes fromBus:(AVAudioNodeBus)sourceBus format:(AVAudioFormat * __nullable)format API_AVAILABLE(macos(10.11), ios(9.0), watchos(2.0), tvos(9.0));
+- (void)connect:(AVAudioNode *)sourceNode toConnectionPoints:(NSArray *)destNodes fromBus:(AVAudioNodeBus)sourceBus format:(AVAudioFormat * __nullable)format API_DEPRECATED_WITH_REPLACEMENT("connect:toConnectionPoints:fromBus:format:error:", ios(9.0, 27.0), watchos(2.0, 27.0), macos(10.11, 27.0), tvos(9.0, 27.0));
 
+/*! @method connect:toConnectionPoints:fromBus:format:error:
+	@abstract
+		Establish connections between a source node and multiple destination nodes.
+	@param sourceNode
+		The source node
+	@param destNodes
+		An array of AVAudioConnectionPoint objects specifying destination
+		nodes and busses
+	@param sourceBus
+		The output bus on source node
+	@param format
+		If non-nil, the format of the source node's output bus is set to this
+		format. In all cases, the format of the destination nodes' input bus is set to
+		match that of the source node's output bus
+	@param error
+		on exit, if an error occurs, a description of the error
+	@return
+		YES for success
+
+	Use this method to establish connections from a source node to multiple destination nodes.
+	Connections made using this method are either one-to-one (when a single destination
+	connection is specified) or one-to-many (when multiple connections are specified), but
+	never many-to-one.
+
+	To incrementally add a new connection to a source node, use this method with an array
+	of AVAudioConnectionPoint objects comprising of pre-existing connections (obtained from
+	`outputConnectionPointsForNode:outputBus:`) and the new connection.
+
+	Note that any pre-existing connection involving the destination's input bus will be
+	broken. And, any pre-existing connection on source node which is not a part of the
+	specified destination connection array will also be broken.
+
+	Also note that when the output of a node is split into multiple paths, all the paths
+	must render at the same rate until they reach a common mixer.
+	In other words, starting from the split node until the common mixer node where all split
+	paths terminate, you cannot have:
+		- any AVAudioUnitTimeEffect
+		- any sample rate conversion
+*/
+- (BOOL)connect:(AVAudioNode *)sourceNode toConnectionPoints:(NSArray *)destNodes fromBus:(AVAudioNodeBus)sourceBus format:(AVAudioFormat * __nullable)format error:(NSError**)error NS_SWIFT_NAME(connectNode(_:to:fromBus:format:)) API_AVAILABLE(macos(27.0), ios(27.0), watchos(27.0), tvos(27.0));
+
 /*! @method disconnectNodeInput:bus:
 	@abstract
 		Remove a connection between two nodes.
@@ -424,7 +520,7 @@
 	@abstract
 		The MusicSequence previously attached to the engine (if any).
  */
-@property (nonatomic, nullable) MusicSequence musicSequence;
+@property (nonatomic, nullable) MusicSequence musicSequence NS_REFINED_FOR_SWIFT;
 #endif
 
 /*! @property outputNode
@@ -748,8 +844,41 @@
     Any client installed block on the source node's audio unit `AUMIDIOutputEventListBlock`
     will be overwritten when making the MIDI connection.
  */
-- (void)connectMIDI:(AVAudioNode *)sourceNode to:(AVAudioNode *)destinationNode format:(AVAudioFormat * __nullable)format eventListBlock:(AUMIDIEventListBlock __nullable)tapBlock API_AVAILABLE(macos(13.0), ios(16.0), tvos(16.0), watchos(9.0));
+- (void)connectMIDI:(AVAudioNode *)sourceNode to:(AVAudioNode *)destinationNode format:(AVAudioFormat * __nullable)format eventListBlock:(AUMIDIEventListBlock __nullable)tapBlock __attribute__((swift_attr("@_disfavoredOverload"))) API_DEPRECATED_WITH_REPLACEMENT("connectMIDI:to:format:eventListProvider:", macos(13.0, 27.0), ios(16.0, 27.0), watchos(9.0, 27.0), tvos(16.0, 27.0));
 
+/*! @method connectMIDI:to:format:eventListProvider:
+	@abstract
+		Establish a MIDI only connection between two nodes.
+	@param sourceNode
+		The source node.
+	@param destinationNode
+		The destination node.
+	@param format
+		If non-nil, the format of the source node's output bus is set to this format.
+		In all cases, the format of the source nodes' output bus has to match with the
+		destination nodes' output bus format.
+		Although the output bus of the source is not in use, the format needs to be set
+		in order to be able to use the sample rate for MIDI event timing calculations.
+	@param tapBlock
+		This block is called from the source node's `AUMIDIOutputEventListBlock`
+		on the realtime thread. The host can tap the MIDI data of the source node through
+		this block.
+
+	Use this method to establish a MIDI only connection between a source node and a
+	destination node that has MIDI input capability.
+
+	The source node can only be a AVAudioUnit node of type `kAudioUnitType_MIDIProcessor`.
+	The destination node types can be `kAudioUnitType_MusicDevice`,
+	`kAudioUnitType_MusicEffect` or `kAudioUnitType_MIDIProcessor`.
+
+	Note that any pre-existing MIDI connection involving the destination will be broken.
+
+	Any client installed block on the source node's audio unit `AUMIDIOutputEventListBlock`
+	will be overwritten when making the MIDI connection.
+ */
+
+- (void)connectMIDI:(AVAudioNode *)sourceNode to:(AVAudioNode *)destinationNode format:(AVAudioFormat * __nullable)format eventListProvider:(AVMIDIEventListBlock __nullable)tapBlock API_AVAILABLE(macos(27.0), ios(27.0), tvos(27.0), watchos(27.0));
+
 /*! @method connectMIDI:toNodes:format:block:
     @abstract
         Establish a MIDI only connection between a source node and multiple destination nodes.
@@ -820,7 +949,43 @@
     Any client installed block on the source node's audio unit `AUMIDIOutputEventListBlock`
     will be overwritten when making the MIDI connection.
  */
-- (void)connectMIDI:(AVAudioNode *)sourceNode toNodes:(NSArray *)destinationNodes format:(AVAudioFormat * __nullable)format eventListBlock:(AUMIDIEventListBlock __nullable)tapBlock API_AVAILABLE(macos(13.0), ios(16.0), tvos(16.0), watchos(9.0));
+- (void)connectMIDI:(AVAudioNode *)sourceNode toNodes:(NSArray *)destinationNodes format:(AVAudioFormat * __nullable)format eventListBlock:(AUMIDIEventListBlock __nullable)tapBlock __attribute__((swift_attr("@_disfavoredOverload"))) API_DEPRECATED_WITH_REPLACEMENT("connectMIDI:toNodes:format:eventListProvider:", macos(13.0, 27.0), ios(16.0, 27.0), watchos(9.0, 27.0), tvos(16.0, 27.0));
+
+/*! @method connectMIDI:toNodes:format:eventListProvider:
+	@abstract
+		Establish a MIDI only connection between a source node and multiple destination nodes.
+	@param sourceNode
+		The source node.
+	@param destinationNodes
+		An array of AVAudioNodes specifying destination nodes.
+	@param format
+		If non-nil, the format of the source node's output bus is set to this format.
+		In all cases, the format of the source nodes' output bus has to match with the
+		destination nodes' output bus format.
+		Although the output bus of the source is not in use, the format needs to be set
+		in order to be able to use the sample rate for MIDI event timing calculations.
+	@param tapBlock
+		This block is called from the source node's `AUMIDIOutputEventListBlock`
+		on the realtime thread. The host can tap the MIDI data of the source node through
+		this block.
+
+	Use this method to establish a MIDI only connection between a source node and
+	multiple destination nodes.
+
+	The source node can only be a AVAudioUnit node of type `kAudioUnitType_MIDIProcessor`.
+	The destination node types can be `kAudioUnitType_MusicDevice`,
+	`kAudioUnitType_MusicEffect` or `kAudioUnitType_MIDIProcessor`.
+
+	MIDI connections made using this method are either one-to-one (when a single
+	destination connection is specified) or one-to-many (when multiple connections are
+	specified), but never many-to-one.
+
+	Note that any pre-existing connection involving the destination will be broken.
+
+	Any client installed block on the source node's audio unit `AUMIDIOutputEventListBlock`
+	will be overwritten when making the MIDI connection.
+ */
+- (void)connectMIDI:(AVAudioNode *)sourceNode toNodes:(NSArray *)destinationNodes format:(AVAudioFormat * __nullable)format eventListProvider:(AVMIDIEventListBlock __nullable)tapBlock API_AVAILABLE(macos(27.0), ios(27.0), tvos(27.0), watchos(27.0));
 
 /*! @method disconnectMIDI:from:
     @abstract
diff -ruN /Applications/Xcode_26.5.0.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX.sdk/System/Library/Frameworks/AVFAudio.framework/Headers/AVAudioEnvironmentNode.h /Applications/Xcode_27.0.0-beta.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX.sdk/System/Library/Frameworks/AVFAudio.framework/Headers/AVAudioEnvironmentNode.h
--- /Applications/Xcode_26.5.0.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX.sdk/System/Library/Frameworks/AVFAudio.framework/Headers/AVAudioEnvironmentNode.h	2026-04-18 22:05:10
+++ /Applications/Xcode_27.0.0-beta.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX.sdk/System/Library/Frameworks/AVFAudio.framework/Headers/AVAudioEnvironmentNode.h	2026-05-23 02:50:53
@@ -50,7 +50,7 @@
         A standalone instance of AVAudioEnvironmentDistanceAttenuationParameters cannot be created. 
         Only an instance vended out by a source object (e.g. AVAudioEnvironmentNode) can be used.
 */
-API_AVAILABLE(macos(10.10), ios(8.0), watchos(2.0), tvos(9.0))
+NS_SWIFT_SENDABLE API_AVAILABLE(macos(10.10), ios(8.0), watchos(2.0), tvos(9.0))
 @interface AVAudioEnvironmentDistanceAttenuationParameters : NSObject {
 @private
 	void *_impl;
@@ -113,7 +113,7 @@
         Only an instance vended out by a source object (e.g. AVAudioEnvironmentNode) can be used.
 */
 
-API_AVAILABLE(macos(10.10), ios(8.0), watchos(2.0), tvos(9.0))
+NS_SWIFT_SENDABLE API_AVAILABLE(macos(10.10), ios(8.0), watchos(2.0), tvos(9.0))
 @interface AVAudioEnvironmentReverbParameters : NSObject {
 @private
 	void *_impl;
@@ -205,7 +205,7 @@
         with a desired AudioChannelLayout.
 */
 
-API_AVAILABLE(macos(10.10), ios(8.0), tvos(9.0)) API_UNAVAILABLE(watchos)
+NS_SWIFT_SENDABLE API_AVAILABLE(macos(10.10), ios(8.0), tvos(9.0)) API_UNAVAILABLE(watchos)
 @interface AVAudioEnvironmentNode : AVAudioNode 
 
 - (instancetype)init NS_DESIGNATED_INITIALIZER;
diff -ruN /Applications/Xcode_26.5.0.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX.sdk/System/Library/Frameworks/AVFAudio.framework/Headers/AVAudioFile.h /Applications/Xcode_27.0.0-beta.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX.sdk/System/Library/Frameworks/AVFAudio.framework/Headers/AVAudioFile.h
--- /Applications/Xcode_26.5.0.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX.sdk/System/Library/Frameworks/AVFAudio.framework/Headers/AVAudioFile.h	2026-04-18 21:41:01
+++ /Applications/Xcode_27.0.0-beta.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX.sdk/System/Library/Frameworks/AVFAudio.framework/Headers/AVAudioFile.h	2026-05-22 08:25:33
@@ -25,7 +25,7 @@
 		Reads and writes are always sequential, but random access is possible by setting the
 		framePosition property.
 */
-NS_SWIFT_SENDABLE API_AVAILABLE(macos(10.10), ios(8.0), watchos(2.0), tvos(9.0))
+API_AVAILABLE(macos(10.10), ios(8.0), watchos(2.0), tvos(9.0))
 @interface AVAudioFile : NSObject
 - (instancetype)init API_DEPRECATED("Deprecated - use initForReading or initForWriting", macos(10.10, 26.0), ios(8.0, 26.0), watchos(2.0, 26.0), tvos(9.0, 26.0), macCatalyst(10.10, 26.0));
 
@@ -133,6 +133,10 @@
 		YES for success.
 	@discussion
 		Like `readIntoBuffer:error:`, but can be used to read fewer frames than buffer.frameCapacity.
+
+		Starting in macOS 27.0, iOS 27.0, watchOS 27.0, and tvOS 27.0, attempting to read beyond the
+		end of the file will return NO and set outError to an NSError with domain NSOSStatusErrorDomain
+		and code kAudioFileEndOfFileError.
 */
 - (BOOL)readIntoBuffer:(AVAudioPCMBuffer *)buffer frameCount:(AVAudioFrameCount)frames error:(NSError **)outError;
 
diff -ruN /Applications/Xcode_26.5.0.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX.sdk/System/Library/Frameworks/AVFAudio.framework/Headers/AVAudioFormat.h /Applications/Xcode_27.0.0-beta.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX.sdk/System/Library/Frameworks/AVFAudio.framework/Headers/AVAudioFormat.h
--- /Applications/Xcode_26.5.0.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX.sdk/System/Library/Frameworks/AVFAudio.framework/Headers/AVAudioFormat.h	2026-04-18 22:05:10
+++ /Applications/Xcode_27.0.0-beta.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX.sdk/System/Library/Frameworks/AVFAudio.framework/Headers/AVAudioFormat.h	2026-05-22 05:36:49
@@ -7,7 +7,7 @@
 
 #import 
 
-#if __has_include() && !0
+#if __has_include() && !0 && !0
 #define AVAUDIOFORMAT_HAVE_CMFORMATDESCRIPTION 1
 #import 
 #endif
@@ -45,7 +45,7 @@
 	
 		Instances of this class are immutable.
 */
-NS_SWIFT_SENDABLE API_AVAILABLE(macos(10.10), ios(8.0), watchos(2.0), tvos(9.0))
+API_AVAILABLE(macos(10.10), ios(8.0), watchos(2.0), tvos(9.0))
 @interface AVAudioFormat : NSObject  {
 @private
 	AudioStreamBasicDescription _asbd;
@@ -148,7 +148,18 @@
  	@discussion
  		If formatDescription is invalid, this method fails (returns nil).
  */
-- (instancetype)initWithCMAudioFormatDescription:(CMAudioFormatDescriptionRef)formatDescription API_AVAILABLE(macos(10.11), ios(9.0), watchos(2.0), tvos(9.0));
+- (instancetype)initWithCMAudioFormatDescription:(CMAudioFormatDescriptionRef)formatDescription API_DEPRECATED_WITH_REPLACEMENT("initWithFormatDescription:", macos(10.11, 27.0), ios(9.0, 27.0), watchos(2.0, 27.0), tvos(9.0, 27.0));
+
+/*!
+	@method initWithFormatDescription:
+	@abstract initialize from a CMAudioFormatDescriptionRef.
+	@param formatDescription
+		the CMAudioFormatDescriptionRef.
+	@discussion
+		If formatDescription is invalid, this method fails (returns nil).
+ */
+- (nullable instancetype)initWithFormatDescription:(CMAudioFormatDescriptionRef)formatDescription API_AVAILABLE(macos(27), ios(27), watchos(27), tvos(27));
+
 #endif
 
 /*!	@method isEqual:
diff -ruN /Applications/Xcode_26.5.0.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX.sdk/System/Library/Frameworks/AVFAudio.framework/Headers/AVAudioIONode.h /Applications/Xcode_27.0.0-beta.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX.sdk/System/Library/Frameworks/AVFAudio.framework/Headers/AVAudioIONode.h
--- /Applications/Xcode_26.5.0.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX.sdk/System/Library/Frameworks/AVFAudio.framework/Headers/AVAudioIONode.h	2026-04-18 19:21:10
+++ /Applications/Xcode_27.0.0-beta.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX.sdk/System/Library/Frameworks/AVFAudio.framework/Headers/AVAudioIONode.h	2026-05-22 05:43:57
@@ -35,11 +35,20 @@
  
 		Note that when the engine is configured to operate in 
 		`AVAudioEngineManualRenderingModeRealtime`, this block will be called from a realtime 
-		context. Care should be taken not to make any blocking call (e.g. calling libdispatch,
+		context and using AVAudioIONodeInputBlockRealtimeSafe is preferred.
+		Care should be taken not to make any blocking call (e.g. calling libdispatch,
 		blocking on a mutex, allocating memory etc.) which may cause an overload at the lower layers.
 */
-typedef const AudioBufferList * __nullable (^AVAudioIONodeInputBlock)(AVAudioFrameCount inNumberOfFrames) API_AVAILABLE(macos(10.13), ios(11.0), watchos(4.0), tvos(11.0));
+typedef const AudioBufferList * __nullable (^ NS_SWIFT_NONSENDABLE AVAudioIONodeInputBlock)(AVAudioFrameCount inNumberOfFrames) API_AVAILABLE(macos(10.13), ios(11.0), watchos(4.0), tvos(11.0));
 
+/*! @typedef AVAudioIONodeInputBlockRealtimeSafe
+    @abstract
+		Identical to AVAudioIONodeInputBlock, with the addition of a realtime-safety guarantee.
+		When the engine is configured to operate in `AVAudioEngineManualRenderingModeRealtime`,
+		use of this block is preferred.
+*/
+typedef const AudioBufferList * __nullable (^AVAudioIONodeInputBlockRealtimeSafe)(AVAudioFrameCount inNumberOfFrames) CA_REALTIME_API API_AVAILABLE(macos(27.0), ios(27.0), watchos(27.0), tvos(27.0), visionos(27.0)) __SWIFT_UNAVAILABLE_MSG("Swift is not supported for use with audio realtime threads");
+
 /*!
 	@enum       AVAudioVoiceProcessingSpeechActivityEvent
 	@abstract	Types of speech activity events.
@@ -100,7 +109,7 @@
 		In the manual rendering mode, the AVAudioInputNode and AVAudioOutputNode perform the input
 		and output in the engine, in response to client's request.
 */
-API_AVAILABLE(macos(10.10), ios(8.0), watchos(2.0), tvos(9.0))
+NS_SWIFT_SENDABLE API_AVAILABLE(macos(10.10), ios(8.0), watchos(2.0), tvos(9.0))
 @interface AVAudioIONode : AVAudioNode
 
 /*!	@property presentationLatency
@@ -120,7 +129,7 @@
 	@discussion
 		This is only necessary for certain advanced usages.
 */
-@property (nonatomic, readonly, nullable) AudioUnit audioUnit;
+@property (nonatomic, readonly, nullable) AudioUnit audioUnit NS_REFINED_FOR_SWIFT;
 #endif
 
 /*! @property voiceProcessingEnabled
@@ -179,7 +188,7 @@
 		In the manual rendering mode, the format of the output scope is initially the same as that
 		of the input, but you may set it to a different format, in which case the node will convert.
 */
-API_AVAILABLE(macos(10.10), ios(8.0), watchos(4.0), tvos(11.0))
+NS_SWIFT_SENDABLE API_AVAILABLE(macos(10.10), ios(8.0), watchos(4.0), tvos(11.0))
 @interface AVAudioInputNode : AVAudioIONode 
 - (instancetype)init NS_UNAVAILABLE; // fetch instance via -[AVAudioEngine inputNode].
 
@@ -201,6 +210,13 @@
 */
 - (BOOL)setManualRenderingInputPCMFormat:(AVAudioFormat *)format inputBlock:(AVAudioIONodeInputBlock)block API_AVAILABLE(macos(10.13), ios(11.0), watchos(4.0), tvos(11.0));
 
+/*! @method setRealtimeSafeManualRenderingInputPCMFormat:inputBlock:
+    @abstract
+        Identical to setManualRenderingInputPCMFormat:inputBlock:, but requires a realtime-safe
+        input block.
+*/
+- (BOOL)setRealtimeSafeManualRenderingInputPCMFormat:(AVAudioFormat *)format inputBlock:(AVAudioIONodeInputBlockRealtimeSafe)block API_AVAILABLE(macos(27.0), ios(27.0), watchos(27.0), tvos(27.0), visionos(27.0)) __SWIFT_UNAVAILABLE_MSG("Swift is not supported for use with audio realtime threads");
+
 /*! @property voiceProcessingBypassed
     @abstract
        Bypass all processing for microphone uplink done by the voice processing unit.
@@ -238,7 +254,7 @@
 		Continuous presence of or lack of speech activity during mute will not cause redundant notification.
 		In order to use this API, it's expected to implement the mute via the voiceProcessingInputMuted.
 */
-- (BOOL)setMutedSpeechActivityEventListener:(nullable void (^)(AVAudioVoiceProcessingSpeechActivityEvent event))listenerBlock API_AVAILABLE(macos(14.0), ios(17.0), tvos(17.0)) API_UNAVAILABLE(watchos);
+- (BOOL)setMutedSpeechActivityEventListener:(nullable void (^ NS_SWIFT_SENDABLE)(AVAudioVoiceProcessingSpeechActivityEvent event))listenerBlock API_AVAILABLE(macos(14.0), ios(17.0), tvos(17.0)) API_UNAVAILABLE(watchos);
 
 /*! @property voiceProcessingOtherAudioDuckingConfiguration
 	@abstract
@@ -270,7 +286,7 @@
 		The format of the input scope is initially the same as that of the
 		output, but you may set it to a different format, in which case the node will convert.
 */
-API_AVAILABLE(macos(10.10), ios(8.0), watchos(2.0), tvos(9.0))
+NS_SWIFT_SENDABLE API_AVAILABLE(macos(10.10), ios(8.0), watchos(2.0), tvos(9.0))
 @interface AVAudioOutputNode : AVAudioIONode
 - (instancetype)init NS_UNAVAILABLE; // fetch instance via -[AVAudioEngine outputNode].
 
diff -ruN /Applications/Xcode_26.5.0.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX.sdk/System/Library/Frameworks/AVFAudio.framework/Headers/AVAudioMixerNode.h /Applications/Xcode_27.0.0-beta.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX.sdk/System/Library/Frameworks/AVFAudio.framework/Headers/AVAudioMixerNode.h
--- /Applications/Xcode_26.5.0.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX.sdk/System/Library/Frameworks/AVFAudio.framework/Headers/AVAudioMixerNode.h	2026-04-18 23:16:02
+++ /Applications/Xcode_27.0.0-beta.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX.sdk/System/Library/Frameworks/AVFAudio.framework/Headers/AVAudioMixerNode.h	2026-05-22 08:28:49
@@ -19,7 +19,7 @@
 		conversions. It also accepts any channel count and will correctly upmix or downmix
 		to the output channel count.
 */
-API_AVAILABLE(macos(10.10), ios(8.0), watchos(2.0), tvos(9.0))
+NS_SWIFT_SENDABLE API_AVAILABLE(macos(10.10), ios(8.0), watchos(2.0), tvos(9.0))
 @interface AVAudioMixerNode : AVAudioNode 
 
 - (instancetype)init NS_DESIGNATED_INITIALIZER;
diff -ruN /Applications/Xcode_26.5.0.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX.sdk/System/Library/Frameworks/AVFAudio.framework/Headers/AVAudioMixing.h /Applications/Xcode_27.0.0-beta.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX.sdk/System/Library/Frameworks/AVFAudio.framework/Headers/AVAudioMixing.h
--- /Applications/Xcode_26.5.0.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX.sdk/System/Library/Frameworks/AVFAudio.framework/Headers/AVAudioMixing.h	2026-04-18 21:43:23
+++ /Applications/Xcode_27.0.0-beta.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX.sdk/System/Library/Frameworks/AVFAudio.framework/Headers/AVAudioMixing.h	2026-05-22 05:24:21
@@ -42,7 +42,7 @@
 	For example, an AVAudioPlayerNode that is being used in a gaming scenario can set up its
 	3D mixing settings and then move from one environment to another.
 */
-API_AVAILABLE(macos(10.10), ios(8.0), watchos(2.0), tvos(9.0))
+NS_SWIFT_SENDABLE API_AVAILABLE(macos(10.10), ios(8.0), watchos(2.0), tvos(9.0))
 @protocol AVAudioMixing 
 
 /*! @abstract Returns the AVAudioMixingDestination object corresponding to specified mixer node and
@@ -85,7 +85,7 @@
 /*! @protocol   AVAudioStereoMixing
     @abstract   Protocol that defines stereo mixing properties
 */
-API_AVAILABLE(macos(10.10), ios(8.0), watchos(2.0), tvos(9.0))
+NS_SWIFT_SENDABLE API_AVAILABLE(macos(10.10), ios(8.0), watchos(2.0), tvos(9.0))
 @protocol AVAudioStereoMixing 
 
 /*! @property pan
@@ -223,6 +223,7 @@
 /*! @protocol   AVAudio3DMixing
     @abstract   Protocol that defines 3D mixing properties
 */
+NS_SWIFT_SENDABLE
 @protocol AVAudio3DMixing 
 
 /*! @property renderingAlgorithm
@@ -319,7 +320,7 @@
 		Only an instance vended by a source node (e.g. AVAudioPlayerNode) can be used
 		(see `AVAudioMixing`).
 */
-API_AVAILABLE(macos(10.11), ios(9.0), watchos(2.0), tvos(9.0))
+NS_SWIFT_SENDABLE API_AVAILABLE(macos(10.11), ios(9.0), watchos(2.0), tvos(9.0))
 @interface AVAudioMixingDestination : NSObject  {
 @private
 	void *_impl;
diff -ruN /Applications/Xcode_26.5.0.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX.sdk/System/Library/Frameworks/AVFAudio.framework/Headers/AVAudioNode.h /Applications/Xcode_27.0.0-beta.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX.sdk/System/Library/Frameworks/AVFAudio.framework/Headers/AVAudioNode.h
--- /Applications/Xcode_26.5.0.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX.sdk/System/Library/Frameworks/AVFAudio.framework/Headers/AVAudioNode.h	2026-04-18 21:43:24
+++ /Applications/Xcode_27.0.0-beta.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX.sdk/System/Library/Frameworks/AVFAudio.framework/Headers/AVAudioNode.h	2026-05-22 05:24:22
@@ -29,7 +29,7 @@
 	@discussion
 		CAUTION: This callback may be invoked on a thread other than the main thread.
 */
-typedef void (^AVAudioNodeTapBlock)(AVAudioPCMBuffer *buffer, AVAudioTime *when);
+typedef void (^ NS_SWIFT_NONSENDABLE AVAudioNodeTapBlock)(AVAudioPCMBuffer *buffer, AVAudioTime *when);
 
 /*!
 	@class AVAudioNode
@@ -48,7 +48,7 @@
 
 		Nodes do not currently provide useful functionality until attached to an engine.
 */
-API_AVAILABLE(macos(10.10), ios(8.0), watchos(2.0), tvos(9.0))
+NS_SWIFT_SENDABLE API_AVAILABLE(macos(10.10), ios(8.0), watchos(2.0), tvos(9.0))
 @interface AVAudioNode : NSObject {
 @protected
 	void *_impl;
@@ -114,13 +114,57 @@
 // start engine
 

+AVAudioEngine *engine = [[AVAudioEngine alloc] init];
+AVAudioInputNode *input = [engine inputNode];
+AVAudioFormat *format = [input outputFormatForBus: 0];
+NSError *error = nil;
+BOOL success = [input installTapOnBus: 0 bufferSize: 8192 format: format error:&error block: ^(AVAudioPCMBuffer *buf, AVAudioTime *when) {
+// ‘buf' contains audio captured from input node at time 'when'
+}];
+....
+// start engine
+

+// start engine and player
+NSError *nsErr = nil;
+[_engine startAndReturnError:&nsErr];
+if (!nsErr) {
+	const float kStartDelayTime = 0.5; // sec
+	AVAudioFormat *outputFormat = [_player outputFormatForBus:0];
+	AVAudioFramePosition startSampleTime = _player.lastRenderTime.sampleTime + kStartDelayTime * outputFormat.sampleRate;
+	AVAudioTime *startTime = [AVAudioTime timeWithSampleTime:startSampleTime atRate:outputFormat.sampleRate];
+	[_player playAtTime:startTime];
+}
+