Audio Gateway architecture integrating DeepDub, Twilio, and Soniox for voice processing exposes a critical blast radius when the gateway lacks network isolation. Audio input flows through noise suppression, voice detection, and speech-to-text into a Brain component orchestrating LLM conversations, policy enforcement, and data extraction—all sharing direct access to PostgreSQL, Redis, and LLM keys. Compromise of the Audio Gateway grants attackers full database and secrets access, violating least-privilege principles. Security architects must implement network segmentation, secrets management, and zero-trust boundaries between the gateway and backend services. Fork this diagram on Diagrams.so to model remediation patterns: API gateways, service meshes, or dedicated secret vaults.