---
title: sampleBufferCallbackQueue
framework: avfoundation
role: symbol
role_heading: Instance Property
path: avfoundation/avcaptureaudiodataoutput/samplebuffercallbackqueue
---

# sampleBufferCallbackQueue

The queue on which delegate callbacks are invoked

## Declaration

```swift
var sampleBufferCallbackQueue: dispatch_queue_t? { get }
```

## See Also

### Receiving captured audio data

- [setSampleBufferDelegate(_:queue:)](avfoundation/avcaptureaudiodataoutput/setsamplebufferdelegate(_:queue:).md)
- [sampleBufferDelegate](avfoundation/avcaptureaudiodataoutput/samplebufferdelegate.md)
- [AVCaptureAudioDataOutputSampleBufferDelegate](avfoundation/avcaptureaudiodataoutputsamplebufferdelegate.md)