---
title: audioUnitMIDIProtocol
framework: audiotoolbox
role: symbol
role_heading: Instance Property
path: audiotoolbox/auaudiounit/audiounitmidiprotocol
---

# audioUnitMIDIProtocol

## Declaration

```swift
var audioUnitMIDIProtocol: MIDIProtocolID { get }
```

## See Also

### Instance properties

- [hostMIDIProtocol](audiotoolbox/auaudiounit/hostmidiprotocol.md)
- [midiOutputEventListBlock](audiotoolbox/auaudiounit/midioutputeventlistblock.md)
- [migrateFromPlugin](audiotoolbox/auaudiounit/migratefromplugin.md)
- [scheduleMIDIEventListBlock](audiotoolbox/auaudiounit/schedulemidieventlistblock.md)