Text-to-Speech (TTS)

The technology that converts written text into spoken audio, giving AI voice agents a human-sounding voice to respond to callers.

Technical definition

Modern TTS systems use neural network models that generate audio waveforms from text input. Unlike older concatenative or formant-based systems, neural TTS produces natural-sounding speech with appropriate prosody (rhythm, stress, and intonation). Streaming TTS begins generating audio before the full text is available, reducing perceived latency in conversational applications.

How Verabase uses Text-to-Speech

Verabase uses Deepgram Aura voices for text-to-speech, available via your Deepgram API key. After the AI agent generates a text response through the RAG pipeline, the response is converted to speech using your selected voice (Asteria, Stella, or Orion). Audio is streamed back to the caller's browser via WebRTC with low latency. You can select the voice per agent under Agent Settings → Voice → TTS Voice.

Why it matters for support teams

The quality and naturalness of the TTS voice determines whether callers engage with your voice AI or hang up. Robotic or monotone voices trigger immediate distrust. Modern neural voices like Deepgram Aura are nearly indistinguishable from human speech, with natural pauses, emphasis, and warmth that keep callers comfortable and engaged.

Related terms

How Verabase Handles Self-Healing Knowledge

The standard industry approach relies on support agents manually flagging stale content and technical writers updating documentation weeks later. Verabase completely upends this model through an autonomous AI platform that identifies knowledge gaps the moment an AI agent encounters a question it cannot answer.

Rather than requiring manual intervention, our visual RAG engine drafts a proposed fix. It analyzes the context of the user's question, reviews your existing knowledge base for conflicts, and creates a clear, structured article or snippet. All you need to do is click 'Approve'. This ensures your AI agents continually get smarter over time without adding to your support team's workload.

Security First Architecture

Many legacy platforms bolt AI onto their existing infrastructure, creating potential data leaks between tenants or exposing sensitive internal documents to end-users. Verabase is built from the ground up with a Bring Your Own Key (BYOK) architecture, enterprise-grade access controls, and strict semantic boundaries. This means your private engineering documents never accidentally leak into customer-facing agent responses.