I tried to build something kind of like NotebookLM (personalized news podcasts) over the past months (https://www.tailoredpod.ai https://www.tailoredpod.ai), bu

I tried to build something kind of like NotebookLM (personalized news podcasts) over the past months (https://www.tailoredpod.ai https://www.tailoredpod.ai), but biggest issue is that the existing good TTS Apis are so expensive that a product such as NotebookLM is not really possible for a normal company that doesn't have internal access to Google's models. OpenAI has the cheapest / quality good enough TTS Api, but even then generating hours of audio for free is way too expensive. Open Source TTS models are slowly catching up, but they still need beefy hardware (e.g. https://github.com/SWivid/F5-TTS https://github.com/SWivid/F5-TTS)