---
title: "init(devicePlacement:deviceCapabilities:primaryAudioSourceDeviceIdentifier:secondaryAudioSourceDeviceIdentifier:)"
framework: AudioAccessoryKit
role: symbol
role_heading: Initializer
platforms: [iOS 26.4+]
path: "audioaccessorykit/accessorycontroldevice/configuration-swift.struct/init(deviceplacement:devicecapabilities:primaryaudiosourcedeviceidentifier:secondaryaudiosourcedeviceidentifier:)"
---

# init(devicePlacement:deviceCapabilities:primaryAudioSourceDeviceIdentifier:secondaryAudioSourceDeviceIdentifier:)

Creates an audio accessory configuration.

## Declaration

```swift
init(devicePlacement: AccessoryControlDevice.Placement? = nil, deviceCapabilities: AccessoryControlDevice.Capabilities, primaryAudioSourceDeviceIdentifier: Data? = nil, secondaryAudioSourceDeviceIdentifier: Data? = nil)
```

## Parameters

- `devicePlacement`: The current placement state of the accessory.
- `deviceCapabilities`: The capabilities the accessory supports.
- `primaryAudioSourceDeviceIdentifier`: The Bluetooth address of the primary audio source.
- `secondaryAudioSourceDeviceIdentifier`: The Bluetooth address of secondary audio source.

## Discussion

Discussion For example, the following code creates a configuration for a device that’s not being worn and is using Bluetooth address 0x12356789ABC as its primary audio source: let configuration = Configuration(     devicePlacement: .offHead,     deviceCapabilities: [.placement, .audioSwitching],     primaryAudioSourceDeviceIdentifier: Data([0x12, 0x34, 0x56, 0x78, 0x9A, 0xBC]), )