 In many of his works , elements are played off against one another , simultaneously and successively : in Kontra @-@ Punkte ( " Against Points " , 1952 – 53 ) , which , in its revised form became his official " opus 1 " , a process leading from an initial " point " texture of isolated notes toward a florid , ornamental ending is opposed by a tendency from diversity ( six timbres , dynamics , and durations ) toward uniformity ( timbre of solo piano , a nearly constant soft dynamic , and fairly even durations ) ( Stockhausen Texte , 2 , 20 – 21 ) . In Gruppen ( 1955 – 57 ) , fanfares and passages of varying speed ( superimposed durations based on the harmonic series ) are occasionally flung between three full orchestras , giving the impression of movement in space ( Maconie 2005 , 486 ) . 
