Microsoft Foundry Launches Voice Agents With Realtime Speech-to-Speech Architecture

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Microsoft Foundry has introduced Voice Agents, currently in preview, as a dedicated agent type within its existing agent management platform. Unlike text-based agents that operate on a request-response model, voice agents run over a persistent WebSocket connection to handle the low-latency demands of live conversation. The architecture addresses key challenges such as turn detection, barge-in interruption handling, and a deferred-response pattern required for function calling in real time. Previously, developers had to build speech-to-speech pipelines manually, managing every component from voice activity detection to transcript persistence independently. Foundry's Voice Agents aim to consolidate that infrastructure, reducing the engineering burden for teams building conversational voice applications.

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