<!--
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  "identifier" : "/documentation/AppKit/NSSpeechSynthesizerDelegate",
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  "title" : "NSSpeechSynthesizerDelegate"
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# NSSpeechSynthesizerDelegate

A set of optional methods implemented by delegates of [`NSSpeechSynthesizer`](/documentation/AppKit/NSSpeechSynthesizer) objects.

```
protocol NSSpeechSynthesizerDelegate : NSObjectProtocol
```

## Topics

### Synthesizing Speech

[`speechSynthesizer(_:willSpeakWord:of:)`](/documentation/AppKit/NSSpeechSynthesizerDelegate/speechSynthesizer(_:willSpeakWord:of:))

Sent just before a synthesized word is spoken through the sound output device.

[`speechSynthesizer(_:willSpeakPhoneme:)`](/documentation/AppKit/NSSpeechSynthesizerDelegate/speechSynthesizer(_:willSpeakPhoneme:))

Sent just before a synthesized phoneme is spoken through the sound output device.

[`speechSynthesizer(_:didEncounterErrorAt:of:message:)`](/documentation/AppKit/NSSpeechSynthesizerDelegate/speechSynthesizer(_:didEncounterErrorAt:of:message:))

Sent to the delegate when a speech synthesizer encounters an error in text being synthesized.

[`speechSynthesizer(_:didEncounterSyncMessage:)`](/documentation/AppKit/NSSpeechSynthesizerDelegate/speechSynthesizer(_:didEncounterSyncMessage:))

Sent to the delegate when a speech synthesizer encounters a synchronization error.

[`speechSynthesizer(_:didFinishSpeaking:)`](/documentation/AppKit/NSSpeechSynthesizerDelegate/speechSynthesizer(_:didFinishSpeaking:))

Sent when an [`NSSpeechSynthesizer`](/documentation/AppKit/NSSpeechSynthesizer) object finishes speaking through the sound output device.


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