Root Mean Square is about reflecting on a relationship as a whole, the good, the bad, and everything in between. The actual math term is useful to draw conclusions from data that has both positive and negative numbers. The song explores a parallel in using an analytical lens to process an otherwise emotional mess.
The main sample in this song is from rain pouring down a water grate outside of a venue called Blush while on tour in Duluth, Minnesota. Instead of a tour journal, I love to sample sounds from every place we visit and incorporate them into the music.