---
title: kMusicEventType_Parameter
framework: audiotoolbox
role: symbol
role_heading: Global Variable
path: audiotoolbox/kmusiceventtype_parameter
---

# kMusicEventType_Parameter

An audio unit parameter event.

## Declaration

```swift
var kMusicEventType_Parameter: UInt32 { get }
```

## See Also

### Constants

- [kMusicEventType_AUPreset](audiotoolbox/kmusiceventtype_aupreset.md)
- [kMusicEventType_ExtendedNote](audiotoolbox/kmusiceventtype_extendednote.md)
- [kMusicEventType_ExtendedTempo](audiotoolbox/kmusiceventtype_extendedtempo.md)
- [kMusicEventType_MIDIChannelMessage](audiotoolbox/kmusiceventtype_midichannelmessage.md)
- [kMusicEventType_MIDINoteMessage](audiotoolbox/kmusiceventtype_midinotemessage.md)
- [kMusicEventType_MIDIRawData](audiotoolbox/kmusiceventtype_midirawdata.md)
- [kMusicEventType_Meta](audiotoolbox/kmusiceventtype_meta.md)
- [kMusicEventType_NULL](audiotoolbox/kmusiceventtype_null.md)
- [kMusicEventType_User](audiotoolbox/kmusiceventtype_user.md)