How to "play back" a picture of a sound wave

For many people, the reproduction of recorded sounds takes place in a conceptual black box: sound goes in, and sound comes out, and it’s stored up in things called “records” in between, but the process itself is all very mysterious.  Because of that, the claim that we can play back pictures of sound waves (which seem to be very different things from “records”) is often met with incredulity.  The technique I’ll be describing here “defies belief,” according to Gizmodo. But really there’s nothing magical or even particularly surprising about the fact that we can turn pictures of audio waveforms into sound..... [Continue reading on my Wordpress blog]



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Original content copyright © 2014, Patrick Feaster.