---
title: requestedAudioFormat
framework: avfoundation
role: symbol
role_heading: Instance Property
path: avfoundation/avplayeritemsamplebufferoutputaudioconfiguration/requestedaudioformat
---

# requestedAudioFormat

Indicates the audio format in which the client prefers to receive the output sample buffers.

## Declaration

```swift
var requestedAudioFormat: CMFormatDescription? { get set }
```

## Discussion

Discussion Must be a PCM format. The output CMSampleBuffers' CMFormatDescription may not exactly match this format description, but it will match the parts described in the AudioStreamBasicDescription. Specifying a PCM format is currently required.  In the future it may be optional.