Launch HN: Retell AI (YC W24) – Conversational Speech API for Your LLM

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 really exciting use cases. However, developers often underestimate what's required to build a good and natural-sounding conversational voice AI. Many simply stitch together ASR (speech-to-text), an LLM, and TTS (text-to-speech), and expect to get a great experience. It turns out it's not that simple. There's more going on in conversation than we consciously realize: things like knowing when to speak and when to listen, handling interrupt