# Capturing Audio

First, we need import the __AVFoundation__ framework.

```swift
import AVFoundation
```

Secondly, we should have a global variable to hold __AVAudioRecorder__ instance. We will initialize it later.
```swift
var audioRecorder: AVAudioRecorder!
```

To capture a sound we will use a shared instance of __AVAudioSession__.
```swift
let session = AVAudioSession.sharedInstance()
try! session.setCategory(AVAudioSessionCategoryPlayAndRecord, with: AVAudioSessionCategoryOptions.defaultToSpeaker)
```

Before start capturing audio, let's create a URL to save our recorded audio file.
```swift
let dirPath = NSSearchPathForDirectoriesInDomains(.documentDirectory, .userDomainMask, true)[0] as String
let recordingName = "recordedVoice.wav"
let pathArray = [dirPath, recordingName]
let filePath = URL(string: pathArray.joined(separator: "/"))
```

Now, do the work!
```swift
// Initialize the recorder
try! audioRecorder = AVAudioRecorder(url: filePath!, settings: [:])
// Make metering for audio is enabled
audioRecorder.isMeteringEnabled = true
// Create the file and make system ready to record
audioRecorder.prepareToRecord()
// Go, go, go!
audioRecorder.record()
```

To stop the recording
```swift
audioRecorder.stop()
let audioSession = AVAudioSession.sharedInstance()
audioSession.setActive(false)
```