Listen to Music of the Spheres 2 (Incendiary Lemons) online. Music of the Spheres 2 (Incendiary Lemons) is an English language song and is sung by Aperture Science Psychoacoustic Laboratories. Music of the Spheres 2 (Incendiary Lemons), from the album Portal 2: Songs to Test By (Original Game Soundtrack) (Collectors Edition), was released in the year 2012. The duration of the song is 2:45. Download English songs online from JioSaavn.