In 1819, Carl Maria von Weber wrote a work for piano called "Aufforderung zum Tanz". He also wrote a program for this work about a young man and woman who meet, dance, and part at a ball. The quiet music at the opening of "Aufforderung" leads to some beautiful (and busy) waltz tunes before the work ends with the opening music. In 1841, Hector Berlioz orchestrated "Aufforderung". This version of the music was used for a short ballet in Weber's opera "Der Freischütz" at the Paris Opéra. It was the Berlioz version that was used for the ballet "Le Spectre de la rose".