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# AVAudioApplication

An object that manages one or more audio sessions that belong to an app.

```
class AVAudioApplication
```

## Overview

Access the shared audio application instance to control app-level audio operations, such as requesting microphone permission and controlling audio input muting.

## Topics

### Accessing the shared instance

[`sharedInstance`](/documentation/AVFAudio/AVAudioApplication/shared)

Accesses the shared audio application instance.

### Requesting audio recording permission

[`+  requestRecordPermissionWithCompletionHandler:`](/documentation/AVFAudio/AVAudioApplication/requestRecordPermission(completionHandler:))

Determines whether the app has permission to record audio.

[`recordPermission`](/documentation/AVFAudio/AVAudioApplication/recordPermission-swift.property)

The app’s permission to record audio.

[`recordPermission`](/documentation/AVFAudio/AVAudioApplication/recordPermission-swift.enum)

Constants that indicate the app’s permission to record audio.

### Requesting microphone injection permission

[`+  requestMicrophoneInjectionPermissionWithCompletionHandler:`](/documentation/AVFAudio/AVAudioApplication/requestMicrophoneInjectionPermission(completionHandler:))

Requests the app’s permission to add audio to calls.

[`microphoneInjectionPermission`](/documentation/AVFAudio/AVAudioApplication/microphoneInjectionPermission-swift.property)

A value that indicates an app’s permission to add audio to calls.

[`MicrophoneInjectionPermission`](/documentation/AVFAudio/AVAudioApplication/MicrophoneInjectionPermission-swift.enum)

Constants that indicate an app’s permission to add audio to calls.

### Managing audio input mute state

[`inputMuted`](/documentation/AVFAudio/AVAudioApplication/isInputMuted)

A Boolean value that indicates whether the app’s audio input is in a muted state.

[`-  setInputMuted:error:`](/documentation/AVFAudio/AVAudioApplication/setInputMuted(_:))

Sets a Boolean value that indicates whether the app’s audio input is in a muted state.

[`AVAudioApplicationInputMuteStateChangeNotification`](/documentation/AVFAudio/AVAudioApplication/inputMuteStateChangeNotification)

A notification the system posts when the app’s audio input mute state changes.

[`-  setInputMuteStateChangeHandler:error:`](/documentation/AVFAudio/AVAudioApplication/setInputMuteStateChangeHandler(_:))

Sets a callback to handle changes to application-level audio muting states.

## Relationships

### Conforms To

[`SendableMetatype`](/documentation/Swift/SendableMetatype)

[`CVarArg`](/documentation/Swift/CVarArg)

[`CustomStringConvertible`](/documentation/Swift/CustomStringConvertible)

[`Sendable`](/documentation/Swift/Sendable)

[`Equatable`](/documentation/Swift/Equatable)

[`Hashable`](/documentation/Swift/Hashable)

[`CustomDebugStringConvertible`](/documentation/Swift/CustomDebugStringConvertible)

[`NSObjectProtocol`](/documentation/ObjectiveC/NSObjectProtocol)

### Inherits From

[`NSObject-swift.class`](/documentation/ObjectiveC/NSObject-swift.class)

---

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