---
title: kMDItemAudioSampleRate
framework: coreservices
role: symbol
role_heading: Global Variable
path: coreservices/kmditemaudiosamplerate
---

# kMDItemAudioSampleRate

Sample rate of the audio data contained in the file. The sample rate is a float value representing hz (audio_frames/second). For example: 44100.0, 22254.54. A CFNumber.

## Declaration

```swift
let kMDItemAudioSampleRate: CFString!
```