Thanks! The audio was rendered via a narration web service I wrote for the backend of my project. It took 12 seconds to narrate and generate metadata (used to highlight the word or sentence that’s being spoken).
I’d be happy to set something up such that you could post the contents of a new post to a webhook, and it could respond with embed code immediately. Placing the embed code e.g. under the post title would load a small widget you could play the audio from.
It’s also possible to tune the narration quality specifically for LessWrong so it uses the proper lexicon and more natural emphasis :)
It’d be no problem to include speed control features in the first version, and text highlighting shortly thereafter (I already have this feature in my mobile app.)