Voice-First Assistive Agents: Real-Time Audio Memory Systems with FastAPI & TTS

## Designing for Voice-Only Interfaces Voice-first applications require a completely different design paradigm than chat screens. Latency, clarity, and conversational state tracking are paramount. ### Low-Latency Speech Pipelines Minimizing Time-to-First-Token (TTFT) requires streaming audio chunking, fast intent recognition via lightweight LLM models, and synthesized SSML speech markup for realistic prosody and pitch variations. ### Spatial Memory Indexing Memories of object locations are parsed into spatial graphs stored in MySQL with timestamped validity states, allowing natural queries like "Where did I put my keys this morning?".