▁BBC . ▁By ▁striking ▁randomly ▁and ▁with ▁deliber ate ▁sens eless ness ▁at ▁a ▁collection ▁of ▁per cussion ▁instruments , ▁the ▁two ▁( as ▁" T ess ier " ▁and ▁" Sch midt ") ▁had ▁produced ▁a ▁str enu ously ▁meaning less ▁twelve - min ute ▁" work " ▁of ▁super f icial ly ▁" avant - gar de " ▁character ; ▁this ▁was ▁completed ▁by ▁the ▁addition ▁of ▁a ▁selection ▁of ▁human ▁wh ist ling ▁sounds ▁( ev ident ly ▁meant ▁to ▁represent ▁the ▁" ta pe "), ▁and ▁with ▁the ▁resulting ▁cha os ▁being ▁edited ▁into ▁some ▁kind ▁of ▁whole ▁by ▁BBC ▁techn icians . ▁ ▁Re ve aling ▁the ▁true ▁nature ▁of ▁the ▁work ▁was ▁itself ▁apparently ▁part ▁of ▁the ▁public ity ▁for ▁the ▁BBC ▁broadcast ▁of ▁a ▁radio ▁document ary , ▁The ▁Str ange ▁Case ▁of ▁Pi otr ▁Zak , ▁first ▁a ired ▁on ▁ 1 3 ▁August ▁ 1 9 6 1 , ▁in ▁which ▁K eller ▁discussed ▁his ▁ho ax ▁with ▁music ▁critics ▁Jer emy ▁No ble ▁and ▁Donald ▁Mitchell . ▁ ▁Both ▁critics ▁agreed ▁that ▁the ▁manner ▁of ▁presentation ▁required ▁them ▁to ▁take ▁the ▁piece ▁seriously , ▁but , ▁since ▁they ▁both ▁had ▁given ▁it ▁an ▁unf av ou rable ▁review , ▁they ▁could ▁not ▁be ▁said ▁to ▁have ▁been ▁fully ▁taken ▁in ▁by ▁the ▁ho ax . ▁ ▁In ▁the ▁months ▁and ▁years ▁after ▁the ▁original ▁broadcast , ▁some ▁tell ings ▁of ▁the ▁story ▁indicated ▁that ▁Zak ' s ▁work ▁received ▁fav ou rable ▁reviews