---
title: supportsMPE
framework: audiotoolbox
role: symbol
role_heading: Instance Property
path: audiotoolbox/auaudiounit/supportsmpe
---

# supportsMPE

A Boolean value that indicates whether the audio unit supports multi-dimensional polyphonic expression.

## Declaration

```swift
var supportsMPE: Bool { get }
```

## See Also

### Providing Data to the Host

- [musicalContextBlock](audiotoolbox/auaudiounit/musicalcontextblock.md)
- [transportStateBlock](audiotoolbox/auaudiounit/transportstateblock.md)
- [contextName](audiotoolbox/auaudiounit/contextname.md)
- [AUHostMusicalContextBlock](audiotoolbox/auhostmusicalcontextblock.md)
- [AUHostTransportStateBlock](audiotoolbox/auhosttransportstateblock.md)