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How does speech-to-text (Whisper) work, and what matters when building voice AI (STT + TTS)?

Voice is a major modality and a common applied-AI surface. The signal is the audio-to-text pipeline, why Whisper is resilient, and the cumulative latency budget that makes or breaks a real-time voice agent.

Updated Aug 2026 · Grounded in real Applied AI Engineer interview loops and written to a senior-engineer editorial bar.

Voice is a major modality and a common applied-AI surface. The signal is the audio-to-text pipeline, why Whisper is resilient, and the cumulative latency budget that makes or breaks a real-time voice agent.

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