---
title: MIDIUniqueID
framework: coremidi
role: symbol
role_heading: Type Alias
path: coremidi/midiuniqueid
---

# MIDIUniqueID

A MIDI object’s unique identifier.

## Declaration

```swift
typealias MIDIUniqueID = Int32
```

## See Also

### Parameter Types

- [kMIDIInvalidUniqueID](coremidi/kmidiinvaliduniqueid.md)
- [MIDIObjectType](coremidi/midiobjecttype.md)