This work was composed along with a series of vocal compositions based on texts by Hungarian poet Sándor Weöres.
It was composed in 1955 in Budapest but was first performed thirteen years later, on March 16, 1968, in Stockholm, with the Swedish Radio Choir under the baton of Eric Ericson.
The piece is well known among musicians and musicologists for its use of canon for creating clusters of sound[4] and the juxtaposition of opposing ideas.
However, Reggel is a five-part composition, scored for sopranos, mezzo-sopranos, altos, tenors, and basses, and is a much more lively and fast movement (marked Vivace, stridente).
Prestissimo molto leggiero, where the choir plays very fast and short eighth notes while tenor and soprano solo voices sing Kikeriki ("Cock-a-doodle-do") using falsetto.