Chopin's "Fantasy Impromptu in C sharp minor"

The repertoire of this piece of music means that this piece of music has the characteristics of both a fantasy and an improvisation. The music adopts a complex three-part form. The first and second parts are passionate Allegro, with fast melody running up and down, showing surging passion. The second part turns to mid-range, playing a cantabile lyrical theme. The melody has a dreamlike mood, full of longing and hope for the future. The third part is a reprise of the first part. But the speed is faster and the enthusiasm is higher. When the music calms down from the climax, the first sentence of the second part of the lyrical singing melody appears again in the bass area. But this is the end. The gentle and low sound of the piano seems to sink into quiet meditation, leaving endless beautiful moods in people.

Fantasia is a musical genre that was originally derived from improvisation, so its form rarely conforms to the musical forms mentioned in any textbook.

During the Baroque and Classical periods, a typical fantasia was a tune played on keyboard instruments with a rapidly changing fugue structure. Representative works of the Baroque period include Johann Sebastian Bach's Fantasia: BWV903 (harpsichord), BWV542g minor fantasy and fugue (organ), BWV537c minor fantasy and fugue. Representative works of classical music include Wolfgang Amadeus Mozart's Fantasia in D minor. Modern masterpieces include Ferruccio Busoni's "Fantasia on Counterpoint" and John Corigliano's "Fantasia on Bass". One of the more popular fantasias now is "Croatian Rhapsody".