The bottom staff is a chromatic inversion of the top staff, with middle C as the axis of symmetry What note do you start on? More on that later.) A descending perfect fourth becomes an ascending perfect fourth, and so on. So if the original melody moves up by a major third, say, the inverted version moves down by a major third. (An inversion, for our purposes here, is a chromatic inversion - a mirror image, with the mirror placed horizontally, where all the intervals are preserved exactly - not to be confused with a diatonic inversion. There’s a reason for that: Back Attya, as the name cryptically suggests ( ATTYA being an acronym), is an inversion of All The Things You Are, by Jerome Kern. You can feel intuitively that it has a really solid structure, but at the same time, the chords don’t seem to move in a way that you would expect.
If you listen to it without knowing what it is, there’s something about the harmonic movement that might feel surprising. Ever since Five Pedals Deep, my trio record with Thomas Morgan and Ted Poor, came out in 2010, I’ve gotten a steady trickle of emails asking about a particular tune on it called Back Attya.
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