From Intervals to Drop 2 Voicings: How I figured out chords and the circle of fifths (several progressively more difficult exercises)

Excerpt from the original

There are two important things that guided my process: * **Comprehensible input**: I'm more of a language person than a music person, and as a language learner, the work of a guy named [Stephen Krashen](https://www.sk.com.br/sk-krash-english.html) is really important to me. To put him in a really small nutshell, he basically believes that foreign languages will learn themselves so long as get lots of input that is only just above your current level (ie, something you're capable of understanding, but still introduces a few new things). * **How memory works**: I'm also interested in memory. We have a lot of useful apps out nowadays that help you memorize stuff, but pretty much all of them come down to the work of a German psychologist named [Hermann Ebbinghaus](https://en.wikipedia.org/wiki/Hermann_Ebbinghaus). We can kind of fit him into three nutshells: (1) you will inevitably forget the vast majority of whatever you learn, no matter what you do, so (2) we should review that content, and know that we'll take a bit more away each time we were previously able, then (3) we tend to better remember the first/last things we learned over what's in the middle (I take this to mean more sho