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# convert(to:error:withInputFrom:)

Performs a conversion between audio formats, if the system supports it.

```
func convert(to outputBuffer: AVAudioBuffer, error outError: NSErrorPointer, withInputFrom inputBlock: (AVAudioPacketCount, UnsafeMutablePointer<AVAudioConverterInputStatus>) -> AVAudioBuffer?) -> AVAudioConverterOutputStatus
```

## Parameters

`outputBuffer`

The output audio buffer.

`outError`

The error if the conversion fails.

`inputBlock`

A block the framework calls to get input data.

## Return Value

An [`AVAudioConverterOutputStatus`](/documentation/AVFAudio/AVAudioConverterOutputStatus) type that indicates the conversion status.

## Discussion

The method attempts to fill the buffer to its capacity. On return, the buffer’s length indicates the number of sample frames the framework successfully converts.

## Topics

### Callbacks

[`AVAudioConverterInputBlock`](/documentation/AVFAudio/AVAudioConverterInputBlock)

A block to get input data for conversion, as necessary.


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