Before this video I had a general idea of how audio was represented, but when I saw that the author generated an entire playable wav file directly from the command line, writing byte by byte, I felt like I was learning something. And this, my friends, is what I want to pay for: to feel the click inside my brain that I’m actually discovering (…not learning) something.
I’d now like to know the second part of the story: how bits become analog signals that are converted to sound waves by audio cards? Is the physics behind this process understandable? If you have a good video for that, let me know.