All thematic material of these two contrasting movemtns is derived from four notes:
D, A, F, Bb
stated at the very opening of the first movement.
In the first, basically slow movement, sections stating the thematic nucleus alternate with sections featuring woodwinds solos. The thematic material of these solo passages is not derived from the basic thematic nucleus but is of a free improvisational character.
The second movement, in fast tempo, is a symphonic development of new thematic features of the four – note motif from the first movement.
In the percussion, the hardness or softness of the beaters is indicated in addition to the dynamics. I introduce a five – level scale of hardness of the beater, analogous to the dynamit symbols:
hh – very hard
h – hard
m – medium
s – soft
ss – very soft