The strings -LRB- located offstage -RRB- play very slow , chorale-like music throughout the piece while on several occasions the trumpet -LRB- positioned behind the audience -RRB- plays a short motif that PERSON@1 described as `` the eternal question of existence '' .

The strings , playing from behind the stage , play very slow , chorale-like music throughout the piece while several times the trumpet -LRB- playing from behind the audience -RRB- plays a short group of notes that PERSON@1 described as `` the eternal question of existence '' .
