Watch VoirFilms. Mannheim Steamroller's music is incredibly moving by itself, but add an enthusiastic live performance by some very animated musicians and an intense multimedia presentation and the result is even more powerful. This 56-minute Christmas concert features many favorite numbers from the album Christmas in the Aire, but "Joy to the World" perhaps best epitomizes that distinctive Mannheim Steamroller sound: powerful synthesized melodies and harmonies, an intense drive and pathos, and skillful ornamentation.