---
title: preferredOutputChannelsForStereo
framework: Core Audio
role: symbol
role_heading: Instance Property
platforms: [macOS 15.0+]
path: coreaudio/audiohardwaredevice/preferredoutputchannelsforstereo
---

# preferredOutputChannelsForStereo

An array of two UInt32s, the first for the left channel, the second for the right channel, that indicate the channel numbers to use for stereo output IO on the device.

## Declaration

```swift
var preferredOutputChannelsForStereo: [UInt32] { get throws }
```