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# AudioQueueAllocateBuffer(_:_:_:)

Asks an audio queue object to allocate an audio queue buffer.

```
func AudioQueueAllocateBuffer(_ inAQ: AudioQueueRef, _ inBufferByteSize: UInt32, _ outBuffer: UnsafeMutablePointer<AudioQueueBufferRef?>) -> OSStatus
```

## Parameters

`inAQ`

The audio queue you want to allocate a buffer.

`inBufferByteSize`

The desired capacity of the new buffer, in bytes. Appropriate capacity depends on the processing you will perform on the data as well as on the audio data format.

`outBuffer`

On output, points to the newly allocated audio queue buffer.

## Return Value

A result code. See Result Codes.

## Discussion

Once allocated, the pointer to the audio queue buffer and the buffer’s capacity cannot be changed. The buffer’s size field, `mAudioDataByteSize`, which indicates the amount of valid data, is initially set to 0.

---

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