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In music, perpetuum mobile (Latin and English pronunciation /pəːˌpɛtjʊəm ˈməʊbɪleɪ, ˈməʊbɪli; literally, "perpetual motion"), moto perpetuo (Italian), mouvement perpétuel (French), movimento perpétuo (Portuguese) movimiento perpetuo (Spanish), carries two distinct meanings: first, as pieces or parts of pieces of music characterised by a continuous stream of notes, usually at a rapid tempo; and also as whole pieces, or large parts of pieces, which are to be played in a repititious fashion, often an indefinite number of times.

Types of perpetuum mobile compositionEdit

 
A well-known example as a technique is the presto finale of Frédéric Chopin's Piano Sonata No. 2: This figuration of rapid triplet quavers (eighth notes) continues for the duration of the movement.

As a distinct composition, perpetuum mobile can be defined as one in which part or most of the piece is intended to be repeated an often unspecified number of times, without the "motion" of the melody being halted when a repeat begins.

Canon are often intended to be performed in a moto perpetuo fashion, and can thus be called canon perpetuus.

In some cases the repeats of a "perpetuum mobile" piece are at a different pitch, while a modulation or a chord progression occurs during the repeatable part. Some of the riddle canons of Bach's Das Musikalische Opfer are examples of this particular kind of perpetuum mobile/canon perpetuus.[citation needed]

Perpetuum mobile as a genre of separate musical compositions was at the height of its popularity by the end of the 19th century. Such pieces would often be performed as virtuoso encores, in some cases increasing the tempo along the repeats.

ExamplesEdit

Perpetuum mobile pieces of both kinds include:

Classical periodEdit

  • The finale of Haydn's String Quartet No. 53 in D major ("The Lark"), Op. 64, No. 5
  • The finale of Beethoven's 22nd piano sonata, and large segments of the finales of his Tempest and Appassionata sonatas (although these are not very fast; the Tempest and the 22nd sonata are only marked Allegretto, and the Appassionata is marked Allegro ma non troppo)
  • The second of Franz Schubert's Impromptus, D. 899
  • The fourth of Franz Schubert's moments musicaux (likewise not very fast, marked Moderato)

Romantic periodEdit

20th centuryEdit

21st centuryEdit

ReferencesEdit

Notes
  1. ^ This is most often performed with a rather insignificant obbligato accompaniment. When scored for wind instruments, it becomes a virtuoso challenge of circular breathing and double-tonguing. Béla Fleck has performed it on the banjo.
References
  1. ^ "Salute to ABC - Start-ups - Transdiffusion". www.transdiffusion.org. Retrieved 2018-02-13.