I built an AI history podcast that you can interrupt to ask questions — it answers and picks the story back up

The idea came from a personal frustration about a year ago. I love history but could never find podcasts on the niche topics I wanted, and even with good ones, my curiosity always wanted a detour the host wasn't going to take.

I work in AI/engineering, so I built the tool I wanted. It generates a podcast on any topic — one or two narrators — researches the topic properly and cites its sources, and the part that matters most to me: you can interrupt at any point, by voice or text, ask a question, and the hosts answer in their own voices, fold a deeper dive into the episode, then resume where you stopped. There's also a map and period artwork synced to the narration.

What surprised me building it: the LLM part (planning and writing the episode chapter by chapter) was the easy half. The hard half was everything around it — stitching TTS audio gaplessly, keeping captions and art in sync with the playback clock, and starting the episode within a minute while later chapters are still being written.

It's called Historai (https://historai.ca/), free to try with no account for the demo. Here's the demo episode on the real history of the Odyssey:

https://historai.ca/history/the-odyssey-was-built-from-ruins--db7b634f532942728746182da4306187

Happy to answer questions about how it works, and genuinely interested in feedback — especially from anyone who's tried building conversational audio.