Daily.co voice agent with AssemblyAI Universal-3 Pro Streaming

A guide by Kelsey Foster outlines the process of building a WebRTC voice agent using Daily.co for real-time audio transport and the AssemblyAI Universal-3 Pro Streaming model for speech-to-text, without the use of Pipecat. The integration is designed to demonstrate how Daily's audio tracks connect directly to the AssemblyAI WebSocket, making it suitable for embedding a voice agent into a custom Daily.co application without the need for a full pipeline framework. The tutorial includes steps for setting up the necessary prerequisites such as API keys for AssemblyAI, Daily.co, OpenAI, and Cartesia, alongside a quick start guide involving cloning a GitHub repository, configuring environment variables, and running Python scripts to create a room and start the voice agent. The voice agent processes audio by forwarding PCM bytes to AssemblyAI, generating responses using GPT-4o, and synthesizing audio with Cartesia before sending it back into the Daily.co room. This approach is positioned as an alternative for those who prefer direct integration over Pipecat's more complex pipeline abstractions.

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