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# VZAudioInputStreamSource

The base class for an audio input stream source.

```
class VZAudioInputStreamSource
```

## Overview

An audio input stream source defines how th guest produces audio input data on the host system.

Don’t instantiate `VZAudioInputStreamSource` directly, use one of its subclasses such as [`VZHostAudioInputStreamSource`](/documentation/Virtualization/VZHostAudioInputStreamSource) instead.

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