This might be a leap of synchronicity, but I had my first guitar lesson in quite a while yesterday. In fact snow might've been flying the last time I played with Brendan. One of the key things we worked on was some more complex chords, especially with adjacent tones, such as having both B (2nd) & C (3rd) in an A minor chord.
And Analog Industries cited some sweet gear in a studio just a couple blocks away from me, actually neighboring a friends (very different) studio.
But they name their studio 'The Twelfth Root' after exactly that frequency ratio between two consecutive notes on a chromatic scale.