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Thanks! Applications may set the audio session option AVAudioSessionCategoryOptionDefaultToSpeaker or use the AVAudioSessionPortOverrideSpeaker override for speakerphone functionality. Why did it take so long for Europeans to adopt the moldboard plow? To set the input, the app's session needs to be in control of routing. Microsoft makes no warranties, express or implied, with respect to the information provided here. How to see the number of layers currently selected in QGIS. Copyright 2015 Apple Inc. All Rights Reserved. Save my name, email, and website in this browser for the next time I comment. Using AVAudioSessionCategoryOptionDefaultToSpeaker as an option for the PlayAndRecord category, then immediately setting AVAudioSessionPortOverrideSpeaker is interesting, seeQ&A 1754 for a discussion about how these two ways to route to the speaker are different from each other -- further, if you set AVAudioSessionModeVideoChat it automatically sets AVAudioSessionCategoryOptionAllowBluetooth and AVAudioSessionCategoryOptionDefaultToSpeaker for you. use the AVAudioSession setPreferredInput:error: method. Project Structure: This method takes a AVAudioSessionPortDescription object. Is there a option or category I should be using? The largest number of channels available for the current output route. The preferred method for overriding to the speaker instead of the receiver for speakerphone functionality is through the use of MPVolumeView. Modes affect possible routes and the digital signal processing used for input. Sets the value of the specified key to null. In most cases where setting a preferred value causes some sort of audio system reconfiguration with an active audio session, audio data I/O will be stopped and then restarted. And you may control the input by assigning preferredInput property for AVAudioSession. SetPreferredInput Method (AVFoundation) Learn .NET .NET API browser C# AVAudio Session. AVAudioSessionModeVoiceChat VoIP IP AVAudioSessionCategoryPlayAndRecord AVAudioSessionCategoryOptionAllowBluetooth AVAudioSessionModeVoiceChat Listing 1 demonstrates how applications can find the AVAudioSessionPortDescription that represents the built-in microphone, locate the front microphone (on iPhone 5 or another device that has a front facing microphone), set the front microphone as the preferred data source and set the built-in microphone port as the preferred input. Browse other questions tagged, Where developers & technologists share private knowledge with coworkers, Reach developers & technologists worldwide. On failure, this contains the error details. Indicates that the values of the specified indices in the specified key are about to change. Promotes a regular peer object (IsDirectBinding is true) into a toggleref object. These returned values will accurately reflect what the hardware will present to the client. func setPreferredInput(AVAudioSessionPortDescription?) Many Git commands accept both tag and branch names, so creating this branch may cause unexpected behavior. i have using twilio to perform video call across iphone devices. In other words, both the input and output should always end up on the same Bluetooth HFP device chosen for either input/output even though only the input or output was set individually. Connect and share knowledge within a single location that is structured and easy to search. I know it should be possible, because the phone app does this, but I can't seem to figure out how. A constructor used when creating managed representations of unmanaged objects; Called by the runtime. If not overridden, raises an NSUndefinedKeyException. Card trick: guessing the suit if you see the remaining three cards (important is that you can't move or turn the cards). Can a county without an HOA or Covenants stop people from storing campers or building sheds? All Rights Reserved. Ports (AVAudioSessionPortDescription objects) can be identified by their portType property, for example AVAudioSessionPortBuiltInMic, AVAudioSessionPortHeadsetMic and so on. Are you able to resolve this issue? In iOS 15 and earlier iOS automatically change the input of the route to any external microphone you attach to the iOS device. Returns the value of a property that can be reached using a keypath. By clicking Post Your Answer, you agree to our terms of service, privacy policy and cookie policy. The preferred input port for audio routing. When I launch the app without any external mics attached and initiate the AVAudioSession I have the same log as I have on iOS 16: Then I attach the iRig device (which is basically the external microphone) and I have the following log: As you see, the input of the route matches the preferred input of the AVAudioSession. Use SampleRate instead. This is the intended behavior, but if it's not happening we definitely want to know about it. Returns a string representation of the value of the current instance. This parameter can be null. If you assume current values will always be your preferred values and for example fill our your client format using the hardware format expecting 44.1kHz when the actual sample rate is 48kHz, your application can suffer problems like audio distortion with the further possibility of other failures. Any advice is highly appreciated. The problem I have is switching between bluetooth devices, basically, no matter what I do, it always defaults to the last paired device. Why is sending so few tanks to Ukraine considered significant? TL;DR: Ranging from iOS 16 I face a bizarre behaviour of the AVAudioSession that breaks my app. describes how to choose a specific microphone "Front", "Bottom", "Rear" and so on when available on a device. This site contains user submitted content, comments and opinions and is for informational purposes only. It's what I do when I want to list USB devices in osx, for example. These preferred values are simply hints to the operating system, the actual buffer duration or sample rate may be different once the AVAudioSession has been activated. Upgrade to Microsoft Edge to take advantage of the latest features, security updates, and technical support. Site design / logo 2023 Stack Exchange Inc; user contributions licensed under CC BY-SA. Ive an iOS Guitar Impact app that will get audio sign from enter, course of it and performs the end result audio again to person through output. Everything is different (and much better) in iOS 15. What does "you better" mean in this context of conversation? Click again to stop watching or visit your profile/homepage to manage your watched threads. The currently selected input data source. The typical cases are: (1) AVAudioSessionCategoryPlayAndRecord or AVAudioSessionCategoryMultiRoute this will default to false, but can be set to true. Presents a standard UI to the app user, asking for permission to record. See AVAudioSession.h for further details. Can state or city police officers enforce the FCC regulations? Using APIs introduced in iOS 7, developers can perform tasks such as locating a port description that represents the built-in microphone, locating specific microphones like the "front", "back" or "bottom", setting your choice of microphone as the preferred data source, setting the built-in microphone port as the preferred input and even selecting a preferred microphone polar pattern if the hardware supports it. This is a very small project created to reproduce the issue. I create a playAndRecord AVAudioSession and subscribe for routeChangeNotification notification: When I get a notification - I print the list of available audio inputs, preferred input and current audio route: I have a button that displays an alert with the list of all available audio inputs and providing the way to set each input as preferred: routeChangeNotification was called two times. All the things is completely different (and significantly better) in iOS 15. metadata, allows you t, setPreferredInput(AVAudioSessionPortDescription inPort), From CI to AI: The AI layer in your organization. The largest number of channels available for the current input route. Indicates a change occurred to the indexes for a to-many relationship. Switching between the built in ear speaker, speaker and wired headset works perfectly fine (through a combination of How Intuit improves security, latency, and development velocity with a Site Maintenance - Friday, January 20, 2023 02:00 - 05:00 UTC (Thursday, Jan Were bringing advertisements for technology courses to Stack Overflow, Recording from Built-In Mic when Playing through Bluetooth in iOS, Changing audio input source with AVAudioSession causes crash. Qt: Get the list of available audio devices in Linux. Represents the value associated with the constant AVAudioSessionModeDefault, Represents the value associated with the constant AVAudioSessionModeGameChat, Represents the value associated with the constant AVAudioSessionModeMeasurement, Represents the value associated with the constant AVAudioSessionModeMoviePlayback. Set Preferred Input Method Reference Feedback Definition Namespace: AVFoundation Assembly: Xamarin.iOS.dll In this article Definition Applies to Sets the preferred input data source. do {try session.setPreferredInput . AVAudioSession. As this approach is too dependent on the output string format of those processes, I didn't use it. I am also facing the same issue. AVAudioSession, setPrefferedInput and switching between multiple Bluetooth Devices I'm working on a VoIP app which needs to allow the user to switch between the in built ear speaker, speaker, wired headset and bluetooth head sets. https://developer.apple.com/library/content/qa/qa1799/_index.html Applications may set a preferred data source by using the setPreferredDataSource:error: method of a AVAudioSessionPortDescription object. true if the request was successful, otherwise the outError parameter contains an instance of NSError describing the problem. If there is no way to do it please let me know what is the proper way to manage input source of the route of AVAudioSession. rev2023.1.18.43173. Whether this object recognizes the specified selector. What does and doesn't count as "mitigating" a time oracle's curse? you can call either of the following and the audio from the avplayer will fix its volume: avaudiosession.sharedinstance ().setcategory (avaudiosession.sharedinstance ().category) avaudiosession.sharedinstance ().overrideoutputaudioport (.speaker) note that the volume instantly raises if you were to have another audio source (avaudioplayer, Use InputNumberOfChannels instead. . Click again to start watching. Once I launch the app with none exterior mics hooked up and provoke the AVAudioSession Ive the identical log as Ive on iOS 16: Then I connect the iRig system (which is mainly the exterior microphone) and Ive the next log: As you see, the enter of the route matches the popular enter of the AVAudioSession. Application developers should not use this deprecated. I then use session.setPrefferedInput to switch the input, when using "BeatsStudio Wireless", it will generate the following: When I try changing to the mini503 it outputs: Which clearly shows that the route has not changed. AVAudioSession . return} // Make the built-in microphone input the preferred input. There are several cases however where an application must first activate the audio session (after setting the appropriate category, category options and mode), in order to lean about the capabilities of the current configuration before being able to set a "preferred" value. I have been making an attempt to repair it for hours now (expo & react native), Hallo Wereld with Us at Cisco Dwell in Amsterdam, Straightforward multipart file add for Swift, ios Core Information and Xcode Previews: Find out how to Move FetchResults to a View in Xcode Previews, ios The right way to align textual content to left in Medium Widget Extension in Swift. Note:Applications configured to be the main non-mixable application (e.g., uses the AVAudioSessionCategoryPlayAndRecord category and does NOT set the AVAudioSessionCategoryOptionMixWithOthers option), gain a greater priority in iOS for the honoring of any preferred settings they may have asked for. This property returns an NSArray of AVAudioSessionPortDescription objects. I have the following code: var iphoneInput: AVAudioSessionPortDescription = AVAudioSession.sharedInstance ().availableInputs [0] as! Do peer-reviewers ignore details in complicated mathematical computations and theorems? How to navigate this scenerio regarding author order for a publication? AVAudioSessionPortDescription var error: NSError? This event is no longer raised. An event indicating that the Category has changed. Making statements based on opinion; back them up with references or personal experience. The app dosn't work with BuiltIn microphone of iOS device (because of feedback) - users have to connect guitar via special device: either analog like iRig or digital like iRig HD. Upgrade to Microsoft Edge to take advantage of the latest features, security updates, and technical support. Developers should not use this deprecated method. The following is based on paring the devices in the following order, In this setup, the BeatsStudio Wireless always wins. Stops the specified observer from receiving further notifications of changed values for the specified keyPath. */ public boolean setPreferredInput(AVAudioSessionPortDescription inPort) . Application developers should not use this deprecated method. func setPreferredInput(_ inPort: AVAudioSessionPortDescription?) And you might management the enter by assigning preferredInput property for AVAudioSession. Creates a mutable copy of the specified NSObject. avaudiosession.setpreferredinput. Bluetooth . Deprecated. In iOS 15 and earlier iOS mechanically change the enter of the path to any exterior microphone you connect to the iOS system. What are possible explanations for why blue states appear to have higher homeless rates per capita than red states? I didn't test it against running a PodCast very often so I'm not sure when things broke. Configuration modes for Audio, it provides finer control over the Category property. Because the audio hardware of an iOS device is shared between all apps, audio settings can only be "preferred" (see SetPreferred* methods) and the application developer must account for use-cases where these preferences are overridden. Set "preferred" values when the audio session is not active. Represents the value associated with the constant AVAudioSessionCategoryAmbient. Terms of Use | Privacy Policy | Updated: 2015-10-14. ios Tips on how to finish / cease the casting session with chrome-cast or TV as soon as person kills the applying? Notification constant for MediaServicesWereLost, Notification constant for MediaServicesWereReset. Gets a Boolean value that tells whether another app is playing audio. Even when I attempt to manually change to exterior microphone by assigning the preferredInput for AVAudioSession it would not change the route enter is at all times MicrophoneBuiltIn. Registers an object for being observed externally using an arbitrary method. Retrieves the preferred number of input channels. Instead, they should use ObserveInterruption(NSObject, EventHandler). I don't know if my step-son hates me, is scared of me, or likes me? The order When I launch the app without any external mics attached and initiate the AVAudioSession I have the following log: This is perfectly fine. The current number of channels in the output route. Observed changes are dispatched to the observers objectObserveValue(NSString, NSObject, NSDictionary, IntPtr)method. This property will either return an array of supported polar patterns for the data source, for example AVAudioSessionPolarPatternCardioid, AVAudioSessionPolarPatternOmnidirectional and so on, or nil when no selectable patterns are available. And you may control the input by assigning preferredInput property for AVAudioSession. How dry does a rock/metal vocal have to be during recording? Apparently the only way to do this is to fire the aplay / arecord process from Qt, get the result output from the process and parse the output string to find card names and corresponding IDs. Activates and deactivates the audio session for the application. I create a playAndRecord AVAudioSession and subscribe for routeChangeNotification notification: Once I get a notification I print the record of accessible audio inputs, most well-liked enter and present audio route: Ive a button that shows an alert with the record of all out there audio inputs and offering the way in which to set every enter as most well-liked: routeChangeNotification was known as two occasions, enter of the AVAudioSession route is MicrophoneWired. All the code is in ViewController class. How can I deal with @objc inference deprecation with #selector() in Swift 4? Some iOS devices support getting and setting microphone polar patterns for some of the built-in microphones. thanks! AVAudioSession should be used to collect and record which is very important. AVAudioSession.setPreferredInput (Showing top 2 results out of 315) origin: ibinti/bugvm /** * @since Available in iOS 7.0 and later. The duration of the current buffer, in seconds. setPreferredInput WithBlueTooth not working I finally found the right answer. Any recommendation is extremely appreciated. Attributes Export Attribute Introduced Attribute Unavailable Attribute Different devices will return different data source information. A: iOS 6 automatically selects the choice of built-in microphone (on devices that have two or more built-in microphones) through the use of audio session modes. Releases the resources used by the AVAudioSession object. How can I translate the names of the Proto-Indo-European gods and goddesses into Latin? These returned values will accurately reflect what the hardware will present to the client. Registers an object for being observed externally (using NSString keyPath). Here's some information you might find helpful trying to debug this issue a little bit, or at least information gathering if it turns out to be a regression (I am assuming you're on iOS 10). If there isnt any method to do it please let me know whats the correct method to handle enter supply of the route of AVAudioSession. Developers should not use this deprecated property. By clicking Post Your Answer, you agree to our terms of service, privacy policy and cookie policy. Asking for help, clarification, or responding to other answers. is called, both the preferredInput and the active input given by currentRoute are set to the requested input/microphone. How can citizens assist at an aircraft crash site? Also, I can subscribe to route change, audio interruption and OS Media Reset/Lost notifications given by the OS - this communication is managed by AVAudioSession - . Returns the current Objective-C retain count for the object. To change the output side of the audio route, applications may include a MPVolumeView to easily give users access to the route picker. In iOS 16 the enter of the AVAudioSession Route is at all times MicrophoneBuiltIn irrespective of if I join any exterior microphones like iRig system or headphones with microphone. On failure, this contains the error details. Apple released iOS 16.1 and it looks like this issue is fixed there. Instead, I chose the PulseAudio server to fetch available devices on my system. Activates or deactivates the audio session for the application. If you wish to modify audio behavior, including session configuration you can create your own TVIDefaultAudioDevice and provide it as an . Returns the value of the property associated with the specified key. First story where the hero/MC trains a defenseless village against raiders. Registers an object for being observed externally (using string keyPath). Find centralized, trusted content and collaborate around the technologies you use most. Therefore both the input and output will always end up on the Bluetooth HFP device even though only the input or output was set individually. Bluetooth . I guess the best you can do is typing system_profiler SPAudioDataType, then you can format the output with sed/grep/awk. Even if I try to manually switch to external microphone by assigning the preferredInput for AVAudioSession it doesn't change the route - input is always MicrophoneBuiltIn. Notification constant for SilenceSecondaryAudioHint. Sets the value of a property that can be reached using a keypath. In the case of "built-in microphone", the returned description represents each individual microphone. By default TwilioVideo will manage the application's AVAudioSession and configure it for video conferencing use cases. Are the models of infinitesimal analysis (philosophically) circular? How Intuit improves security, latency, and development velocity with a Site Maintenance - Friday, January 20, 2023 02:00 - 05:00 UTC (Thursday, Jan Were bringing advertisements for technology courses to Stack Overflow. Invokes the selector on the current instance and if the obj is not null, it passes this as its single parameter. You should also control the Mode (using SetMode(NSString, NSError) to describe how your application will use audio. Handle used to represent the methods in the base class for this NSObject. A connection represents a link from a Java application to a database. Application developers should be familiar with asynchronous programming techniques. Not the answer you're looking for? Indicates that a change occurred on the specified key. below code for setting up the session: let audiosession = avaudiosession.sharedinstance () try audiosession.setcategory (.playandrecord, mode: .voicechat, options: [.defaulttospeaker, .mixwithothers, .allowbluetooth, .allowairplay, .allowbluetootha2dp]) try audiosession.setactive It is important to note that they are optimized for the use case specified by each mode and setting a mode may also affect other aspects of the route being used. Important:Different hardware can have different capabilities. To set a preferred input port (built-in mic, wired mic, USB input, etc.) AVAudioSession.setPreferredInput (Showing top 3 results out of 315) origin: robovm/robovm /** * @since Available in iOS 7.0 and later. A tag already exists with the provided branch name. The AVAudioSession, like the AVCaptureSession and AVAssetExportSession is a coordinating object between some number of InputDataSources and OutputDataSources. Just to clarify on this issue: it is not possible in an app to play audio recorded from a device internal mic through an AirPod like the live listen feature (since iOS 12) does? Then I attach the iRig device (which is basically the external microphone) and I have the following log: As you see - the MicrophoneWired appears in the list of available inputs but input of the route is still MicrophoneBuiltIn. Gets the array of UIAccessibilityCustomRotor objects appropriate for this object. statements and results, The BitSet class implements abit array [http://en.wikipedia.org/wiki/Bit_array]. This can be a very small undertaking created to breed the difficulty. Apparently the only way to do this is to fire the aplay/arecord process from Qt, get the result output from the process and parse the output string to find card names and corresponding IDs. I had to make an ugly workaround - instead of checking the current input of the route I'm checking the number of available inputs of the AVAudioSession. AVAudioSessionCategoryOptionMixWithOthers -- This allows an application to set whether or not other active audio apps will be interrupted or mixed with when your app's audio session goes active. I am trying to set the preferred input to my AVAudioEngine. You can use the SetCategory(String, String, AVAudioSessionRouteSharingPolicy, AVAudioSessionCategoryOptions, NSError) method to set this. Sets the values of this NSObject to those in the specified dictionary. Making statements based on opinion; back them up with references or personal experience. If you want something like a actionSheet and need to switch between audio devices seamlessly. Return Value true if the request was successfully executed, otherwise false. Youre now watching this thread and will receive emails when theres activity. Retrieves the preferred number of output channels. Typically, the audio input & output route is chosen by the end user in Control Center. Some information relates to prerelease product that may be substantially modified before its released. Upgrade to Microsoft Edge to take advantage of the latest features, security updates, and technical support. This is because setting AVAudioSessionCategoryOptionDuckOthers to true will automatically also set AVAudioSessionCategoryOptionMixWithOthers to true. When an application sets a preferred value, it will not take effect until the audio session has been activated. Difference Between Switch Cases "@Unknown Default" and "Default" in Swift 5, Reading from the Clipboard with Swift 3 on MACos, A Different Bridging Between Array and Dictionary, Is Removing a Notificationcenter Observer That Was Created with Closure Syntax by Name Adequate, Xcode 10 Beta 5 - Clang: Error: Linker Command Failed with Exit Code 1, How Safe Are Swift Collections When Used with Invalidated Iterators/Indices, How to Find the Index of an Item in Swift, Xcode 11 Doesn't Recognize Core Data Entity, Swift, Pass Data Back from Popover to View Controller, .Dynamictype Is Deprecated. After this setup, you're not actually setting the audio session to active. I searched the release notes of iOS 16 and didn't find any mention of AVAudioSession. Apple disclaims any and all liability for the acts, omissions and conduct of any third parties in connection with or related to your use of the site. Your application desired buffer size in seconds. @MehmetBaykar No. A developer-meaningful description of this object. Handle (pointer) to the unmanaged object representation. Youve stopped watching this thread and will no longer receive emails when theres activity. An instance of the AVFoundation.IAVAudioSessionDelegate model class which acts as the class delegate. Browse other questions tagged, Where developers & technologists share private knowledge with coworkers, Reach developers & technologists worldwide. This method takes a AVAudioSessionPortDescription object. var inputDataSource: AVAudioSessionDataSourceDescription? Then I tried to change preferredInput of the AVAudioSession first to MicrophoneWired, then to MicrophoneBuiltIn and then to MicrophoneWired again: No matter what is preferredInput the input device of AudioSession route is MicrophoneBuiltIn. By clicking Accept all cookies, you agree Stack Exchange can store cookies on your device and disclose information in accordance with our Cookie Policy. Instead use M:AVFoundation.AVAudioSession.SetPreferredSampleRate(Double, out NSError). Microsoft makes no warranties, express or implied, with respect to the information provided here. Application developers should not use this deprecated method. I am trying to set the preferred input to my AVAudioEngine. Then I attempted to alter preferredInput of the AVAudioSession first to MicrophoneWired, then to MicrophoneBuiltIn after which to MicrophoneWired once more: It doesnt matter what is preferredInput the enter system of AudioSession route is MicrophoneBuiltIn. Please let me know if there is any way to make the behaviour of iOS 16 the same it is on iOS 15 and below. Set it like so: [ [AVAudioSession sharedInstance] setPreferredInput:AVAudioSessionPortBluetoothHFP error: &error]; Once recording is done, another device from the list of availableInputs can be picked for playback. What's the term for TV series / movies that focus on a family as well as their individual lives? The app dosnt work with BuiltIn microphone of iOS system (due to suggestions) customers have to attach guitar through particular system: both analog like iRig or digital like iRig HD. This can be a very small undertaking created to breed the difficulty. session.setPreferredInput (inPort: iphoneInput, error: error) https://developer.apple.com/library/content/qa/qa1799/_index.html, Microsoft Azure joins Collectives on Stack Overflow. In iOS 16 the input of the AVAudioSession Route is always MicrophoneBuiltIn - no matter if I connect any external microphones like iRig device or headphones with microphone. Therefore, if an application plans to set multiple preferred values, it is generally advisable to deactivate the session first, set the preferences, reactivate the session and then check the actual values. Application developers should use the singleton object retrieved by SharedInstance(). Factory method that returns the shared AVAudioSession object. The iPhone 5 supports setting the preferred polar pattern for the "front" and "back" built-in microphones. How were Acorn Archimedes used outside education? What are the disadvantages of using a charging station with power banks? describes when to request session preferences such as Preferred Hardware I/O Buffer Duration. Listing 1 in Q&A1799 has some input selection demo code. Datetime formatting i, Reflections one-stop-shop objectReflections scans your classpath, indexes the Requests to temporarily change the output audio port. Sets the preferred input port for audio routing. An array of AVAudioSessionDataSourceDescriptions that list the available sources of the current output route. is determined eithe, General file manipulation utilities. Overriders must call base.AwakeFromNib(). Sets the preferred duration, in seconds, of the IO buffer. AVAudioSessionPortDescription To be added. Indicates an attempt to read a value of an undefined key. If not overridden, raises an NSUndefinedKeyException. More info about Internet Explorer and Microsoft Edge, SetCategory(String, String, AVAudioSessionRouteSharingPolicy, AVAudioSessionCategoryOptions, NSError), AddObserver(NSObject, NSString, NSKeyValueObservingOptions, IntPtr), ObserveValue(NSString, NSObject, NSDictionary, IntPtr), AddObserver(NSObject, String, NSKeyValueObservingOptions, IntPtr), AddObserver(NSString, NSKeyValueObservingOptions, Action), AddObserver(String, NSKeyValueObservingOptions, Action), BeginInvokeOnMainThread(Selector, NSObject), Bind(NSString, NSObject, String, NSDictionary), Bind(String, NSObject, String, NSDictionary), CommitEditing(NSObject, Selector, IntPtr), DidChange(NSKeyValueChange, NSIndexSet, NSString), DidChange(NSString, NSKeyValueSetMutationKind, NSSet), GetDictionaryOfValuesFromKeys(NSString[]), OverrideOutputAudioPort(AVAudioSessionPortOverride, NSError), PerformSelector(Selector, NSObject, Double), PerformSelector(Selector, NSObject, Double, NSString[]), PerformSelector(Selector, NSObject, NSObject), PerformSelector(Selector, NSThread, NSObject, Boolean), PerformSelector(Selector, NSThread, NSObject, Boolean, NSString[]), RemoveObserver(NSObject, NSString, IntPtr), RequestRecordPermission(AVPermissionGranted), SetActive(Boolean, AVAudioSessionFlags, NSError), SetActive(Boolean, AVAudioSessionSetActiveOptions), SetActive(Boolean, AVAudioSessionSetActiveOptions, NSError), SetAggregatedIOPreference(AVAudioSessionIOType, NSError), SetCategory(AVAudioSessionCategory, AVAudioSessionCategoryOptions), SetCategory(String, AVAudioSessionCategoryOptions, NSError), SetCategory(String, String, AVAudioSessionCategoryOptions, NSError), SetInputDataSource(AVAudioSessionDataSourceDescription, NSError), SetOutputDataSource(AVAudioSessionDataSourceDescription, NSError), SetPreferredHardwareSampleRate(Double, NSError), M:AVFoundation.AVAudioSession.SetPreferredSampleRate(Double, out NSError), SetPreferredInput(AVAudioSessionPortDescription, NSError), SetPreferredInputNumberOfChannels(nint, NSError), SetPreferredIOBufferDuration(Double, NSError), SetPreferredOutputNumberOfChannels(nint, NSError), SetValueForUndefinedKey(NSObject, NSString), SetValuesForKeysWithDictionary(NSDictionary), WillChange(NSKeyValueChange, NSIndexSet, NSString), WillChange(NSString, NSKeyValueSetMutationKind, NSSet), ObserveInterruption(NSObject, EventHandler), SetAccessibilityCustomRotors(NSObject, UIAccessibilityCustomRotor[]).
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