Yes, thanks for the feedback! I wasn't planning on feeding it the entire audiobook and trying to align the whole thing (though there are other reasons you might want to do something like this) - I figured I'd use some heuristic methods to detect chapter breaks (like long silences), then try as you say partial matching to figure out which ones correspond to what chapters (or which ones correspond to chapters at all). Like I said, it was a vague plan, but when I've played around with running things through speech-to-text in the past I haven't had excellent results. I was hoping something like this (where you have the speech and the text and just want to know how they line up) would end up being much moreo accurate.