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# init(standardFormatWithSampleRate:channelLayout:)

Creates an audio format instance as a deinterleaved float with the specified sample rate and channel layout.

```
init(standardFormatWithSampleRate sampleRate: Double, channelLayout layout: AVAudioChannelLayout)
```

## Parameters

`sampleRate`

The sampling rate, in hertz.

`layout`

The channel layout, which must not be `nil`.

## Return Value

A new `AVAudioFormat` instance.

## Discussion

The returned `AVAudioFormat` instance uses the [`AVAudioCommonFormat.pcmFormatFloat32`](/documentation/AVFAudio/AVAudioCommonFormat/pcmFormatFloat32) format.

## See Also

[`sampleRate`](/documentation/AVFAudio/AVAudioFormat/sampleRate)

The audio format sampling rate, in hertz.

[`channelLayout`](/documentation/AVFAudio/AVAudioFormat/channelLayout)

The underlying audio channel layout.


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