Definition
Text-to-speech is a technology that converts written text into audible spoken language. Early TTS systems used concatenative synthesis — stitching together pre-recorded phoneme fragments — which produced robotic, unnatural output. Modern neural TTS models use deep learning to generate speech that closely resembles human vocal patterns, complete with natural pauses, intonation shifts, and contextual emphasis. These neural models understand not just individual words but sentence-level meaning, allowing them to stress the right syllables and modulate pace in ways that sound conversational rather than mechanical. In VidNo's pipeline, TTS is the bridge between the AI-generated script and the final audio track. After Claude produces a narration script from your coding session, the TTS system renders that script into a voiceover with natural prosody. When combined with voice cloning, TTS produces audio that sounds like you personally narrating the walkthrough, making the output indistinguishable from a hand-recorded voiceover.