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# AudioConstraintsEvent

> Event emitted when audio constraints change on a call.

Event emitted when audio constraints change on a call.

## **Properties**

**`constraints`** `MediaTrackConstraints` — required

The new constraints applied. See [`MediaTrackConstraints`](https://developer.mozilla.org/en-US/docs/Web/API/MediaTrackConstraints).

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**`method`** `applyConstraints | trackReplacement` — required

How the constraints were applied.

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**`timestamp`** `number` — required

Timestamp when the event occurred (epoch ms).

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> Event emitted when audio constraints change on a call.