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# AVMIDIControlChangeEvent

An object that represents a MIDI control change message.

```
class AVMIDIControlChangeEvent
```

## Topics

### Creating a Control Change Event

[`-  initWithChannel:messageType:value:`](/documentation/AVFAudio/AVMIDIControlChangeEvent/init(channel:messageType:value:))

Creates an event with a channel, control change type, and a value.

### Inspecting a Control Change Event

[`value`](/documentation/AVFAudio/AVMIDIControlChangeEvent/value)

The value of the control change event.

[`messageType`](/documentation/AVFAudio/AVMIDIControlChangeEvent/messageType-swift.property)

The type of control change message.

[`MessageType`](/documentation/AVFAudio/AVMIDIControlChangeEvent/MessageType-swift.enum)

Constants that represents control change event types.

## Relationships

### Conforms To

[`Hashable`](/documentation/Swift/Hashable)

[`CVarArg`](/documentation/Swift/CVarArg)

[`Equatable`](/documentation/Swift/Equatable)

[`CustomDebugStringConvertible`](/documentation/Swift/CustomDebugStringConvertible)

[`NSObjectProtocol`](/documentation/ObjectiveC/NSObjectProtocol)

[`CustomStringConvertible`](/documentation/Swift/CustomStringConvertible)

### Inherits From

[`AVMIDIChannelEvent`](/documentation/AVFAudio/AVMIDIChannelEvent)

---

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