No special equipment—except a laptop capable of running a web browser that can do Web Audio, and microphones and speakers. Which, as the article explains, isn'

No special equipment—except a laptop capable of running a web browser that can do Web Audio, and microphones and speakers. Which, as the article explains, isn't novel. But it's still a nice introduction to the space. I would argue that microphones and speakers are special equipment: most microcontrollers don't have them, most computers are microcontrollers, and most non-microcontroller computers already have better ways to transmit data. I was hoping for an ultrasound codec for an Arduino using the microphonics of the X5R bypass capacitors included on the board, or something like that. Plausibly that is a thing you could do, but nobody has managed it so far that I know of.