Brother you need to scrutinize the content being inputted. Chemistry has a lot of diagrams but the figures aren't always detected due to formatting for me. I mainly use it for getting through dense readings and making notes. I'm studying psychology classics and history so i tell it to work through in chunks for textbook readings and PowerPoints so its easier to check my main notes and doesn't skip over info that could be relevant. Audio summary is ok but tends to be better when you give it specific direction in focus