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# scheduleBuffer(buffer:completionCallbackType:completionHandler:)

Schedules audio data playback with a completion handler.

```
func scheduleBuffer(buffer: AVAudioPCMBuffer, completionCallbackType: PHASEPushStreamCompletionCallbackCondition, completionHandler: @escaping @Sendable (PHASEPushStreamCompletionCallbackCondition) -> Void)
```

```
func scheduleBuffer(buffer: AVAudioPCMBuffer, completionCallbackType: PHASEPushStreamCompletionCallbackCondition) async -> PHASEPushStreamCompletionCallbackCondition
```

## Parameters

`buffer`

Data that represents one portion of a contiguous audio stream.

`completionCallbackType`

The specific event on which to handle completion.

`completionHandler`

Code the framework runs on completion or when the player stops.

## Discussion

> Important:
> You can call this method from synchronous code using a completion handler, as shown on this page, or you can call it as an asynchronous method that has the following declaration:
> 
> ```swift
> func scheduleBuffer(buffer: AVAudioPCMBuffer, completionCallbackType: PHASEPushStreamCompletionCallbackCondition) async -> PHASEPushStreamCompletionCallbackCondition
> ```
> 
> For information about concurrency and asynchronous code in Swift, see <doc://com.apple.documentation/documentation/Swift/calling-objective-c-apis-asynchronously>.

---

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