---
title: kAudioSessionMode_Measurement
framework: audiotoolbox
role: symbol
role_heading: Global Variable
path: audiotoolbox/kaudiosessionmode_measurement
---

# kAudioSessionMode_Measurement

Specify this mode if your app is performing measurement of incoming audio.

## Declaration

```swift
var kAudioSessionMode_Measurement: Int { get }
```

## Discussion

Discussion When this mode is in use, the device does not perform automatic gain adjustment on incoming audio. For use with the kAudioSessionCategory_RecordAudio or kAudioSessionCategory_PlayAndRecord audio session categories. On devices with more than one built-in microphone, the primary microphone is used. This mode is equivalent to the measurement mode provided in the AVFoundation framework.

## See Also

### Constants

- [kAudioSessionMode_Default](audiotoolbox/kaudiosessionmode_default.md)
- [kAudioSessionMode_VoiceChat](audiotoolbox/kaudiosessionmode_voicechat.md)
- [kAudioSessionMode_VideoRecording](audiotoolbox/kaudiosessionmode_videorecording.md)
- [kAudioSessionMode_GameChat](audiotoolbox/kaudiosessionmode_gamechat.md)