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# hasHardwareVoiceCallProcessing

A Boolean value that indicates whether the associated hardware port has built-in processing for two-way voice communication.

```
var hasHardwareVoiceCallProcessing: Bool { get }
```

## Discussion

Applications that use their own proprietary voice-processing algorithms should use this property to decide when to disable processing. If your app uses Apple’s Voice Processing I/O unit (subtype `kAudioUnitSubType_VoiceProcessingIO`), the system automatically manages this for you.

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