{"version":"1.0","type":"card","id":"4e9e0cc7-6719-4f51-b9a2-8946602598ec","url":"https://stacklist.com/card/4e9e0cc7-6719-4f51-b9a2-8946602598ec","title":"How Voice AI Systems Actually Work","source_url":"https://voice.ai/hub/ai-voice-agents/text-to-speech-vs-speech-to-text/","note":"A beginner-friendly breakdown of the technologies behind every voice interaction: speech recognition that converts voice to text and synthesis that turns responses back into speech. Useful grounding before comparing platforms.","image":{"url":"https://ucarecdn.com/b08fe9bd-6bb8-4b4c-a477-e1d19dd06d13/","alt":"How Voice AI Systems Actually Work","width":1217,"height":835},"stack":{"id":"113d3a73-bc75-49dd-8ebb-8daadd1734b8","title":"Voice AI 101","url":"https://stacklist.com/c/technology/stack/113d3a73-bc75-49dd-8ebb-8daadd1734b8"},"created_at":"2026-07-20T09:13:43.856Z","updated_at":null,"aco":{"summary":"Voice AI systems rely on two complementary technologies: text-to-speech (TTS), which converts written content into spoken audio, and speech-to-text (STT), which transforms spoken language into written text. The article explains how modern AI voice agents combine both capabilities to enable natural conversations, and warns that misapplying one in place of the other leads to wasted resources and potential compliance risks.","tags":["voice-ai","text-to-speech","speech-to-text","speech-recognition","voice-agents","natural-language-processing","customer-service"],"key_entities":[{"name":"Text-to-Speech (TTS)","type":"technology","confidence":0.98},{"name":"Speech-to-Text (STT)","type":"technology","confidence":0.98},{"name":"AI Voice Agents","type":"concept","confidence":0.95},{"name":"Voice.ai","type":"organization","confidence":0.9},{"name":"Alexa","type":"technology","confidence":0.75},{"name":"HIPAA","type":"concept","confidence":0.7},{"name":"GDPR","type":"concept","confidence":0.7}],"classification":"analysis","language":"en","confidence":0.85,"provenance":{"model":"claude-opus-4-6","tool":"@stacklist/mcp-server@2.0.0","confidence":0.85,"timestamp":"2026-07-20T09:13:59.700Z"},"token_counts":{"approximate":5905,"cl100k":4410},"content_hash":"sha256:0c3e3d2eb47fc6ddbb35b0ea634f9e1c0d471710b86e3621bace075f643f667d","acp_version":"0.2","body_available":true,"body_tokens":5905,"visibility":"public","agent_accessible":true,"status":"final"},"_links":{"self":"/api/public/card/4e9e0cc7-6719-4f51-b9a2-8946602598ec.json","html":"https://stacklist.com/card/4e9e0cc7-6719-4f51-b9a2-8946602598ec","md":"/api/public/card/4e9e0cc7-6719-4f51-b9a2-8946602598ec.md","stack_json":"/api/public/stack/113d3a73-bc75-49dd-8ebb-8daadd1734b8.json"}}