Drumming

Part1:4 pairs of tuned bongo drums (4 players) 25'
Part2:3 marimbas,sop,alto,picc. (6 players) 26'
Part3:3glsp,sop,alto,picc (6 players) 16'
Part4:4pairs of tuned bongos, 3 marimbas,3glsp,sop,alto,picc,whistling (12 players) 19'
(each of the four parts may be performed separately)