---
title: isMusicDeviceOrEffect
framework: audiotoolbox
role: symbol
role_heading: Instance Property
path: audiotoolbox/auaudiounit/ismusicdeviceoreffect
---

# isMusicDeviceOrEffect

Specifies whether an audio unit responds to MIDI events.

## Declaration

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

## Discussion

Discussion Returns true if the audio unit is a music device or effect.

## See Also

### Managing MIDI Events

- [virtualMIDICableCount](audiotoolbox/auaudiounit/virtualmidicablecount.md)
- [scheduleMIDIEventBlock](audiotoolbox/auaudiounit/schedulemidieventblock.md)
- [midiOutputEventBlock](audiotoolbox/auaudiounit/midioutputeventblock.md)
- [midiOutputNames](audiotoolbox/auaudiounit/midioutputnames.md)
- [AUScheduleMIDIEventBlock](audiotoolbox/auschedulemidieventblock.md)
- [AUMIDIOutputEventBlock](audiotoolbox/aumidioutputeventblock.md)