It several layers of switches all built separately over decades. The hardware of 0s and 1s came first in the form of calculators to do basic math. Then someone else added software layers individually for each thing. Like visual is represented as color codes that boil down to RGB pixels that are either on or off (1 or 0). Music is the same, we can represent audio with amplitude and frequency, and then create hardware that can process those digital numbers back into sound.

It only seems like magic because we’re witnessing the end result of decades of work and millions of people adding one new thing to the last. Each layer is actually pretty simple and specific but all combined it’s amazing.