<!--
{
  "availability" : [
    "iOS: -",
    "iPadOS: -",
    "macCatalyst: -",
    "macOS: -",
    "tvOS: -",
    "visionOS: -"
  ],
  "documentType" : "symbol",
  "framework" : "AudioToolbox",
  "identifier" : "/documentation/AudioToolbox/kAudioUnitType_MusicEffect",
  "metadataVersion" : "0.1.0",
  "role" : "Global Variable",
  "symbol" : {
    "kind" : "Global Variable",
    "modules" : [
      "Audio Toolbox"
    ],
    "preciseIdentifier" : "c:@Ea@kAudioUnitType_Output@kAudioUnitType_MusicEffect"
  },
  "title" : "kAudioUnitType_MusicEffect"
}
-->

# kAudioUnitType_MusicEffect

An effect unit that can respond to MIDI control messages, typically through a mapping of  MIDI messages to parameters of the audio unit’s DSP algorithm.

```
var kAudioUnitType_MusicEffect: UInt32 { get }
```

---

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)