I've been aware for years that it's possible to produce the sorts of images you see in the thumbnail at the left of this post: frequency analysis graphs of an audio file of one sort or another. Audiophiles have been swooning over them for years, but I never have. If my ears were satisfied with the sound of a recording, what additional good would it do me to do a spectrum analysis of that recording?
Well: for the most part, I still think that's true... but I had a very specific reason for dabbling in them lately, which then led me down the rabbit hole of finding them fascinating! I thought I'd share a little about it. [...]