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November 24, 2024

  1. Voice Fallback Plan Introduced: You can now enhance your assistant’s reliability by defining fallback voice providers using assistant.voice.fallbackPlan.voices. This allows your assistant to switch to alternative voices or providers like FallbackLMNTVoice, FallbackAzureVoice, FallbackNeetsVoice, FallbackTavusVoice, FallbackOpenAIVoice, and others if the primary voice provider fails.
Refer to the `FallbackPlan` schema for more information: https://api.vapi.ai/api

  1. Language Selection for PlayHTVoice: The language property has been added to PlayHTVoice. You can now specify the desired language for speech synthesis using assistant.voice.language.

  2. AssemblyAI Transcriber Available: You can now use AssemblyAI for transcribing by setting Assistant.transcriber to AssemblyAITranscriber. This provides a new option for converting speech to text in your assistant.

  3. Updated OpenAI Model Support: The gpt-4o-2024-11-20 model has been added to OpenAIModel.model and OpenAIModel.fallbackModels. You can now configure your assistant to use this latest OpenAI model.

  4. Removal of ‘fillerInjectionEnabled’ Property: The fillerInjectionEnabled property has been removed from voice configurations like LMNTVoice, AzureVoice, etc. You no longer need to include this property when configuring these voices.

November 22, 2024