▁on ▁environmental ▁sculpt ure . ▁H undred s ▁of ▁perform ers ▁performed ▁in ▁an ▁abandoned ▁building ▁turned ▁live ▁art ▁environment ▁in ▁the ▁Mission ▁District , ▁San ▁Francisco , ▁California . ▁At ▁that ▁point , ▁the ▁late ▁artist ▁Peter ▁K ady k ▁was ▁putting ▁together ▁a ▁march ing ▁band ▁for ▁the ▁event , ▁and ▁members ▁of ▁Environment al ▁Enc ro achment ▁took ▁part . ▁E E ▁brought ▁back ▁the ▁idea ▁of ▁a ▁mobile ▁march ing ▁musical ▁band ▁to ▁Chicago , ▁to ▁involve ▁these ▁elements ▁and ▁f use ▁them ▁into ▁the ▁group . ▁ ▁Some ▁of ▁the ▁early ▁members , ▁including ▁John ▁Sant oro , ▁Der on ▁Cav ale tt i , ▁Smith , ▁Scott ▁" White y " ▁Lar son , ▁and ▁Char ly ▁Bar ber a , ▁had ▁been ▁seriously ▁studying ▁African ▁and ▁Car ib bean ▁drum ming . ▁ ▁Smith ▁took ▁up ▁the ▁trom bone , ▁Lar son ▁the ▁t uba , ▁and ▁others ▁such ▁as ▁sa x oph on ist ▁Kurt ▁Is elt , ▁North ▁African - style ▁per cussion ist ▁Qu entin ▁Shaw ▁and ▁trom bon ist ▁Bret ▁L ort ie ▁joined ▁E E , ▁providing ▁a ▁mus ically - sound ▁basis ▁for ▁the ▁group ' s ▁future . ▁ ▁Is elt ▁is ▁cred ited ▁with ▁writing ▁some ▁of ▁the ▁first ▁mel od ies ▁for ▁E E , ▁a ▁number ▁of ▁which ▁are ▁still ▁currently ▁used . ▁ ▁Shaw ▁is ▁cred ited ▁with ▁the ▁group ' s ▁Mor oc can ▁influ ences . ▁ ▁The ▁group ▁was ▁invited ▁as ▁a