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# AVMIDIProgramChangeEvent

An object that represents a MIDI program or patch change message.

```
class AVMIDIProgramChangeEvent
```

## Overview

The effect of this message depends on the [`AVMusicTrack`](/documentation/AVFAudio/AVMusicTrack) destination audio unit.

## Topics

### Creating a Program Change Event

[`init(channel:programNumber:)`](/documentation/AVFAudio/AVMIDIProgramChangeEvent/init(channel:programNumber:))

Creates a program change event with a channel and program number.

### Configuring a Program Change Event

[`programNumber`](/documentation/AVFAudio/AVMIDIProgramChangeEvent/programNumber)

The MIDI program number.


---

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