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# AUHostTransportStateFlags

```
struct AUHostTransportStateFlags
```

## Topics

### Constants

[`AUHostTransportStateChanged`](/documentation/AudioToolbox/AUHostTransportStateFlags/changed)

Indicates such state changes as start, stop, or seeking to another position in the timeline. Can be active if there was a change to the state of, or discontinuities in, the audio transport since the [`AUHostTransportStateBlock`](/documentation/AudioToolbox/AUHostTransportStateBlock) callback was last called.

[`AUHostTransportStateCycling`](/documentation/AudioToolbox/AUHostTransportStateFlags/cycling)

Indicates that the host is cycling or looping.

[`AUHostTransportStateMoving`](/documentation/AudioToolbox/AUHostTransportStateFlags/moving)

Indicates that the audio transport is moving.

[`AUHostTransportStateRecording`](/documentation/AudioToolbox/AUHostTransportStateFlags/recording)

Indicates that the host is recording, or is prepared to record. Can be active with or without a moving state.

## Relationships

### Conforms To

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

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

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

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

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

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

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

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

---

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