This is a companion piece to Chrysalis. There's a basic chord structure in Autumn that's reversed in Chrysalis. It's emphasized most clearly during the swing-waltz sections. I started writing Chrysalis because I realized that the chords from Autumn would work just as well in reverse.
I originally wrote the first and last parts of Autumn as different pieces, but they grew and met each other in the middle. It's fun to write arpeggio-based pieces like this. You can use subtler and stranger progressions than you could with block chords.
