---
title: AVAudioSessionMicrophoneInjectionIsAvailableKey
framework: avfaudio
role: symbol
role_heading: Global Variable
path: avfaudio/avaudiosessionmicrophoneinjectionisavailablekey
---

# AVAudioSessionMicrophoneInjectionIsAvailableKey

A key to retrieve a Boolean value that indicates whether microphone injection is available.

## Declaration

```swift
let AVAudioSessionMicrophoneInjectionIsAvailableKey: String
```

## Discussion

Discussion The associated value is an NSNumber that represents a Boolean value.