id ell ) ▁was ▁as ▁follows : ▁ ▁Pi otr ▁Zak , ▁who ▁is ▁of ▁Polish ▁extra ction ▁but ▁lives ▁in ▁Germany , ▁was ▁born ▁in ▁ 1 9 3 9 . ▁His ▁earliest ▁works ▁are ▁conserv ative , ▁but ▁he ▁has ▁recently ▁come ▁under ▁the ▁influence ▁of ▁Stock hausen ▁and ▁John ▁C age . ▁This ▁work ▁for ▁t ape ▁and ▁per cussion ▁was ▁written ▁between ▁May ▁and ▁September ▁of ▁last ▁year . ▁Within ▁the ▁precise ▁and ▁complex ▁framework ▁defined ▁by ▁the ▁score , ▁there ▁is ▁considerable ▁room ▁for ▁impro vis ation . ▁ ▁The ▁work ▁was ▁review ed ▁by ▁three ▁critics , ▁who ▁gave ▁un enth us i astic ▁or ▁out right ▁condem n atory ▁re actions . ▁ ▁Jer emy ▁No ble ' s ▁review ▁in ▁the ▁Times ▁stated ▁" It ▁was ▁certainly ▁difficult ▁to ▁grasp ▁more ▁than ▁the ▁music ' s ▁broad ▁out lines , ▁partly ▁because ▁of ▁the ▁high ▁proportion ▁of ▁un p itch ed ▁sounds ▁and ▁partly ▁because ▁of ▁their ▁extreme ▁divers ity ". ▁No ble ▁de emed ▁the ▁broadcast ▁a ▁" lapse " ▁on ▁the ▁part ▁of ▁the ▁BBC , ▁and ▁wrote ▁" such ▁recogn iz ably ▁musical ▁events ▁as ▁did ▁occur ▁seemed ▁trivial ". ▁ ▁Further ▁down ▁the ▁scale ▁from ▁No ble ' s ▁extremely ▁faint ▁pra ise , ▁the ▁Daily ▁Te legraph ' s ′ ▁critic ▁Donald ▁Mitchell ▁called ▁the ▁performance ▁" wh olly ▁un re ward ing ", ▁adding ▁that ▁Zak ▁▁ ▁Rol lo ▁My ers , ▁writing ▁in ▁the ▁List ener , ▁was