Short post: last week I came across a wonderful video about how WAV files are made, and how to create one from scratch, directly from NodeJS. The author, Low Level Javascript, is really investing time creating quality content that is direct, clear, and coincise. Consider donating some money to his patreon if you find his videos useful.

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.

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