<!--
{
  "availability" : [
    "macCatalyst: -",
    "macOS: 15.0.0 -"
  ],
  "documentType" : "symbol",
  "framework" : "CoreAudio",
  "identifier" : "/documentation/CoreAudio/AudioHardwareSystem/makeAggregateDevice(description:)",
  "metadataVersion" : "0.1.0",
  "role" : "Instance Method",
  "symbol" : {
    "kind" : "Instance Method",
    "modules" : [
      "Core Audio"
    ],
    "preciseIdentifier" : "s:9CoreAudio0B14HardwareSystemC19makeAggregateDevice11descriptionAA0bcfG0CSgSDySSypG_tKF"
  },
  "title" : "makeAggregateDevice(description:)"
}
-->

# makeAggregateDevice(description:)

Creates a new aggregate device  using the provided description.

```
func makeAggregateDevice(description: [String : Any]) throws -> AudioHardwareAggregateDevice?
```

## Parameters

`description`

The Dictionary that specifies how to build the aggregate device.
The supported keys are described in the AudioAggregateDevice Constants section of
AudioHardware.h.

## Return Value

An AudioHardwareAggregateDevice representing the newly created aggregate device.

---

Copyright &copy; 2026 Apple Inc. All rights reserved. | [Terms of Use](https://www.apple.com/legal/internet-services/terms/site.html) | [Privacy Policy](https://www.apple.com/privacy/privacy-policy)