How to Build a Real-Time Voice Agent with Gemini & ADK by Ashwini Kumar & Neeraj Agrawal, Google Cloud Blog
Google recently published a hands-on guide to creating a low‑latency, bi‑directional, real‑time voice agent using its Gemini model and the Agent Development Kit (ADK). Here’s the core breakdown:
  • Start with a basic conversational agent — one with persona and trained knowledge, but no external tool access.
  • Make it more capable by integrating tools like Google Search and the Maps MCP Toolset, giving your agent real‑world data and dynamic capabilities.
  • Use RunConfig with bi-directional streaming (BIDI) to configure seamless voice input/output and allow interruptions — for natural, conversational feel.
  • Manage concurrency with Python's asyncio and TaskGroup, enabling your system to listen, think, and speak simultaneously.
  • Encode audio responses in Base64 for smooth transmission, and stream text transcripts in real-time to support rich interaction.
Everything you need is in the blog—code samples, configuration tips, and architectural insights to help you get started faster and smoother.
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How to Build a Real-Time Voice Agent with Gemini & ADK by Ashwini Kumar & Neeraj Agrawal, Google Cloud Blog
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