 Because of the limited range available to each player, many of the pieces written for this combination are elementary in nature; many more are arrangements of pieces for other forces.But there are a small number of original works, and a handful of virtuoso three-player groups have emerged in the 21st century.Compositions include five pieces by Percy Grainger, Sergei Rachmaninoff's Romance and Valse, Alfred Schnittke's Hommage, Carl Czerny's opp.