Talking here from my experience. I didn't succeed much in making myself read faster, but when it's come to listening I've easily trained myself to consume most of the content at 3x speed and for some fiction books I can go even faster depend on who is reading and quality of recording.

This obviously wouldn't work for reading technical documentation, but if you watch some educational videos on programming on something you can also easily handle 2-3x when watching video lectures. Though getting used to high-speed video is harder.

Most importantly listening at high speed is super easy to learn. You just starting listen some podcasts or books at 1.1 and gradually increase the speed by 0.1x each time you certain that current speed is comfortable for you. In two weeks you'll certainly handle 2x with no problem at all.

PS: My personal record is listening whole The Expanse book at 4.5x, but it was only possible because I was just laying with my eyes closed and enjoyed the ride. Of course I only listen at 2-3x speed when doing something at home or walking outside.