Hey HN, we're the co-founders of Retell AI (https://www.retellai.com/). We are building a conversational speech engine to help developers build natural-sounding voice AI. Our API abstracts away the complexities of AI voice conversations, so you can make your voice application the best at what it does. Here's a demo video: https://www.youtube.com/watch?v=0LT64_mgkro.With the advent of LLMs and recent breakthroughs in speech synthesis, conversational voice AI has just gotten good enough to create ...