Dan Ehlert Nielsen (b. 1956) is a Danish composer and former organist at Kong Haakons Kirke in Copenhagen.
The core of the Adagio Stocastico is a sequence of randomly selected notes which were subsequently manipulated using a set of rules. The procedure is described in detail in the score which is freely available at https://imslp.org/wiki/Category:Nielsen,_Dan_Ehlert