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

# NSSpeechSynthesizer.SpeechPropertyKey.ErrorKey

Keys that identify errors that may occur during speech synthesis.

## Declaration

```swift
struct ErrorKey
```

## Discussion

Discussion Use these keys in the errors dictionary.

## Topics

### Type Properties

- [count](appkit/nsspeechsynthesizer/speechpropertykey/errorkey/count.md)
- [newestCharacterOffset](appkit/nsspeechsynthesizer/speechpropertykey/errorkey/newestcharacteroffset.md)
- [newestCode](appkit/nsspeechsynthesizer/speechpropertykey/errorkey/newestcode.md)
- [oldestCharacterOffset](appkit/nsspeechsynthesizer/speechpropertykey/errorkey/oldestcharacteroffset.md)
- [oldestCode](appkit/nsspeechsynthesizer/speechpropertykey/errorkey/oldestcode.md)

### Initializers

- [init(rawValue:)](appkit/nsspeechsynthesizer/speechpropertykey/errorkey/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](appkit/nsspeechsynthesizer/speechpropertykey.md)
- [NSSpeechSynthesizer.SpeechPropertyKey.CommandDelimiterKey](appkit/nsspeechsynthesizer/speechpropertykey/commanddelimiterkey.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)