---
title: NSSpeechSynthesizer.SpeechPropertyKey
framework: appkit
role: symbol
role_heading: Structure
path: appkit/nsspeechsynthesizer/speechpropertykey
---

# NSSpeechSynthesizer.SpeechPropertyKey

These constants are used with setObject(_:forProperty:) and object(forProperty:) to get or set the characteristics of a synthesizer.

## Declaration

```swift
struct SpeechPropertyKey
```

## Topics

### Speech Property Keys

- [status](appkit/nsspeechsynthesizer/speechpropertykey/status.md)
- [errors](appkit/nsspeechsynthesizer/speechpropertykey/errors.md)
- [inputMode](appkit/nsspeechsynthesizer/speechpropertykey/inputmode.md)
- [characterMode](appkit/nsspeechsynthesizer/speechpropertykey/charactermode.md)
- [numberMode](appkit/nsspeechsynthesizer/speechpropertykey/numbermode.md)
- [rate](appkit/nsspeechsynthesizer/speechpropertykey/rate.md)
- [pitchBase](appkit/nsspeechsynthesizer/speechpropertykey/pitchbase.md)
- [pitchMod](appkit/nsspeechsynthesizer/speechpropertykey/pitchmod.md)
- [volume](appkit/nsspeechsynthesizer/speechpropertykey/volume.md)
- [synthesizerInfo](appkit/nsspeechsynthesizer/speechpropertykey/synthesizerinfo.md)
- [recentSync](appkit/nsspeechsynthesizer/speechpropertykey/recentsync.md)
- [phonemeSymbols](appkit/nsspeechsynthesizer/speechpropertykey/phonemesymbols.md)
- [currentVoice](appkit/nsspeechsynthesizer/speechpropertykey/currentvoice.md)
- [commandDelimiter](appkit/nsspeechsynthesizer/speechpropertykey/commanddelimiter.md)
- [reset](appkit/nsspeechsynthesizer/speechpropertykey/reset.md)
- [outputToFileURL](appkit/nsspeechsynthesizer/speechpropertykey/outputtofileurl.md)

### Type Aliases

- [NSSpeechSynthesizer.SpeechPropertyKey.CommandDelimiterKey](appkit/nsspeechsynthesizer/speechpropertykey/commanddelimiterkey.md)
- [NSSpeechSynthesizer.SpeechPropertyKey.ErrorKey](appkit/nsspeechsynthesizer/speechpropertykey/errorkey.md)
- [NSSpeechSynthesizer.SpeechPropertyKey.Mode](appkit/nsspeechsynthesizer/speechpropertykey/mode.md)
- [NSSpeechSynthesizer.SpeechPropertyKey.PhonemeInfoKey](appkit/nsspeechsynthesizer/speechpropertykey/phonemeinfokey.md)
- [NSSpeechSynthesizer.SpeechPropertyKey.StatusKey](appkit/nsspeechsynthesizer/speechpropertykey/statuskey.md)
- [NSSpeechSynthesizer.SpeechPropertyKey.SynthesizerInfoKey](appkit/nsspeechsynthesizer/speechpropertykey/synthesizerinfokey.md)

### Initializers

- [init(rawValue:)](appkit/nsspeechsynthesizer/speechpropertykey/init(rawvalue:).md)

## Relationships

### Conforms To

- [Equatable](swift/equatable.md)
- [Hashable](swift/hashable.md)
- [RawRepresentable](swift/rawrepresentable.md)
- [Sendable](swift/sendable.md)
- [SendableMetatype](swift/sendablemetatype.md)

## See Also

### Configuring Speech Attributes

- [addSpeechDictionary(_:)](appkit/nsspeechsynthesizer/addspeechdictionary(_:).md)
- [NSSpeechSynthesizer.DictionaryKey](appkit/nsspeechsynthesizer/dictionarykey.md)
- [object(forProperty:)](appkit/nsspeechsynthesizer/object(forproperty:).md)
- [setObject(_:forProperty:)](appkit/nsspeechsynthesizer/setobject(_:forproperty:).md)
- [NSSpeechSynthesizer.SpeechPropertyKey.CommandDelimiterKey](appkit/nsspeechsynthesizer/speechpropertykey/commanddelimiterkey.md)
- [NSSpeechSynthesizer.SpeechPropertyKey.ErrorKey](appkit/nsspeechsynthesizer/speechpropertykey/errorkey.md)
- [NSSpeechSynthesizer.SpeechPropertyKey.Mode](appkit/nsspeechsynthesizer/speechpropertykey/mode.md)
- [NSSpeechSynthesizer.SpeechPropertyKey.PhonemeInfoKey](appkit/nsspeechsynthesizer/speechpropertykey/phonemeinfokey.md)
- [NSSpeechSynthesizer.SpeechPropertyKey.StatusKey](appkit/nsspeechsynthesizer/speechpropertykey/statuskey.md)
- [NSSpeechSynthesizer.SpeechPropertyKey.SynthesizerInfoKey](appkit/nsspeechsynthesizer/speechpropertykey/synthesizerinfokey.md)
- [NSSpeechSynthesizer.VoiceGender](appkit/nsspeechsynthesizer/voicegender.md)