Impromptus (Schubert) - Four Impromptus, D. 935 (Op. Posth. 142)

Four Impromptus, D. 935 (Op. Posth. 142)

As the first and last pieces in this set are in the same key (F minor), and the set bears some resemblance to a 4-movement sonata, these Impromptus have been accused of being a sonata in disguise, notably by Robert Schumann and Alfred Einstein, who claim that Schubert called them Impromptus, and allowed them to be individually published to enhance their sales potential. However, this claim has been refuted by contemporary musicologists such as Charles Fisk, who established important differences between the set of Impromptus and Schubert's acknowledged multi-movement works. It is also believed that the set was originally intended to be a continuation of the previous set, as Schubert originally numbered them as Nos. 5–8.