Heavier is a collaboration that started five years ago, said Harrison Mills and Clayton Knight of ODESZA. "We discovered Emile/Yellow House on SoundCloud and were immediately drawn to his voice and performance. After successfully working on a few demos, we flew him out from South Africa to work with us in our Seattle studio. From the start, the music had that unmistakable energy of having discovered something special. We were drawn to a unique blend of electronic production and Emile's incredible ability to craft nostalgic melodies and storytelling lyrics. From there, we built out a number of tracks and explored different combinations of those two worlds."