Frédéric Chopin's Impromptu No. 1 in A♭ major, Op. 29 was composed in 1837.
The Impromptu is in ternary form (ABA), the middle being in the key of F minor. A perpetuum mobile in triplets accompanies the piece.
In popular culture
In George du Maurier's novel Trilby, the title character, a singer who can perform only under the influence of hypnosis, performs the Impromptu in A♭ major as a wordless vocalise to end her concerts.
- ^ Hinson, Maurice (2000). Guide to the pianist's repertoire. Indiana University Press. p. 194. ISBN 978-0-253-33646-0.
- ^ Huneker, James (1909). Chopin: the man and his music. New York: C. Scribner's Sons. pp. 238–239.