GoogleTTSCapability class abstract

Google-specific TTS capability interface

This interface provides Google Gemini's native text-to-speech capabilities which differ from traditional TTS APIs by using chat-like interactions with audio output modality.

Key Features:

  • Controllable speech style through natural language prompts
  • Single and multi-speaker support
  • Voice configuration with prebuilt voices
  • Streaming audio generation
  • Integration with chat models for audio output

Usage Example:

final googleProvider = await ai()
    .google()
    .apiKey(apiKey)
    .model('gemini-2.5-flash-preview-tts')
    .build();

if (googleProvider is GoogleTTSCapability) {
  final response = await googleProvider.generateSpeech(
    GoogleTTSRequest(
      text: 'Say cheerfully: Have a wonderful day!',
      voiceConfig: GoogleVoiceConfig.prebuilt('Kore'),
    ),
  );
  // response.audioData contains the generated audio
}
Implementers

Constructors

GoogleTTSCapability.new()

Properties

hashCode → int
The hash code for this object.
no setterinherited
runtimeType → Type
A representation of the runtime type of the object.
no setterinherited

Methods

generateSpeech(GoogleTTSRequest request) → Future<GoogleTTSResponse>
Generate speech from text using Google's native TTS
generateSpeechStream(GoogleTTSRequest request) → Stream<GoogleTTSStreamEvent>
Generate speech with streaming output
getAvailableVoices() → Future<List<GoogleVoiceInfo>>
Get available voices for Google TTS
getSupportedLanguages() → Future<List<String>>
Get supported languages for Google TTS
noSuchMethod(Invocation invocation) → dynamic
Invoked when a nonexistent method or property is accessed.
inherited
toString() → String
A string representation of this object.
inherited

Operators

operator ==(Object other) → bool
The equality operator.
inherited

Static Methods

getPredefinedVoices() → List<GoogleVoiceInfo>
Get predefined Google TTS voices
getSupportedLanguageCodes() → List<String>
Get supported languages for Google TTS