# AudioEventBackend

`import { AudioEventBackend } from "destack:audio/binding";`

Audio backend event.

```ds title="AudioEventBackend"
export struct AudioEventBackend {
    kind: "backend";
    timestampNs: uint64;
    sequence: uint64;
    backend: AudioBackendKind;
    isAvailable: boolean;
}
```

[language/library/src/audio/binding/event.ds:89:100](https://github.com/destack-sh/destack/blob/main/language/library/src/audio/binding/event.ds#L89-L100)

## Members

### `kind: "backend"`

Event discriminator.

### `timestampNs: uint64`

Event timestamp in nanoseconds.

### `sequence: uint64`

Event sequence number.

### `backend: AudioBackendKind`

Audio backend.

### `isAvailable: boolean`

Whether the backend is available.