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# AUParameterEventType

Audio unit parameter event types.

```
enum AUParameterEventType
```

## Topics

### Constants

[`kParameterEvent_Immediate`](/documentation/AudioToolbox/AUParameterEventType/parameterEvent_Immediate)

An immediate change from the parameter’s previous value to a new value.

[`kParameterEvent_Ramped`](/documentation/AudioToolbox/AUParameterEventType/parameterEvent_Ramped)

A gradual change from the parameter’s previous value to a new value, applied linearly over a specified period of time

## Relationships

### Conforms To

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

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

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

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

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

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

---

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