---
title: "AudioConverterSetProperty(_:_:_:_:)"
framework: audiotoolbox
role: symbol
role_heading: Function
path: "audiotoolbox/audioconvertersetproperty(_:_:_:_:)"
---

# AudioConverterSetProperty(_:_:_:_:)

Sets the value of an audio converter object property.

## Declaration

```swift
func AudioConverterSetProperty(_ inAudioConverter: AudioConverterRef, _ inPropertyID: AudioConverterPropertyID, _ inPropertyDataSize: UInt32, _ inPropertyData: UnsafeRawPointer) -> OSStatus
```

## Parameters

- `inAudioConverter`: The audio converter to set a property value on.
- `inPropertyID`: The property whose value you want to set.
- `inPropertyDataSize`: The size, in bytes, of the property value.
- `inPropertyData`: The value you want to apply to the specified property.

## Return Value

Return Value A  result code.

## Discussion

Discussion You can employ the property mechanism, for example, to split a monaural input to both channels of a stereo output. You would do this as follows:  SInt32 channelMap[2] = {0, 0}; // array size should match the number of output channels  AudioConverterSetProperty (     theConverter,     kAudioConverterChannelMap,     sizeof(channelMap),     channelMap );

## See Also

### Configuring Audio Converter Properties

- [AudioConverterGetProperty(_:_:_:_:)](audiotoolbox/audioconvertergetproperty(_:_:_:_:).md)
- [AudioConverterGetPropertyInfo(_:_:_:_:)](audiotoolbox/audioconvertergetpropertyinfo(_:_:_:_:).md)