▁musical es ▁by ▁Jos quin ▁des ▁Pre z ▁( late ▁ 1 5 th ▁century ); ▁and ▁the ▁Ag n us ▁De i ▁from ▁the ▁Miss a ▁L ' homme ▁arm é ▁by ▁Pierre ▁de ▁la ▁R ue ▁( ear ly ▁ 1 6 th ▁century ). ▁Johann ▁Sebastian ▁Bach ▁is ▁known ▁for ▁his ▁Can on ▁a ▁ 4 ▁per ▁Aug ment ation em ▁et ▁Dim in ution em , ▁the ▁last ▁in ▁a ▁set ▁of ▁ 1 4 ▁can ons ▁written ▁as ▁an ▁append ix ▁to ▁the ▁Gold berg ▁Vari ations . ▁In ▁the ▁ 2 0 th ▁century , ▁one ▁such ▁canon ▁is ▁the ▁Cant us ▁in ▁Mem or iam ▁Benjamin ▁Brit ten ▁by ▁Ar vo ▁P är t ▁( 1 9 7 6 ). ▁Additionally , ▁Larry ▁Pol ans ky ▁has ▁written ▁numerous ▁four - voice ▁pro lation ▁can ons ▁whose ▁mel od ies ▁are ▁permut ations ▁of ▁a ▁limited ▁number ▁of ▁elements , ▁and ▁Mark ▁Al burger , ▁in ▁Im mort ality ▁from ▁San ▁Rafael ▁News , ▁directly ▁maps ▁a ▁new ▁mel ody ▁into ▁the ▁framework ▁of ▁the ▁a for ement ioned ▁Jos quin . ▁ ▁A ▁particularly ▁striking ▁example ▁of ▁pro lation ▁canon ▁occurs ▁twice ▁in ▁the ▁opening ▁movement ▁of ▁Sh ost akov ich ' s ▁Sym phony ▁No . ▁ 1 5 ▁( 1 9 7 1 ), ▁first ▁in ▁the ▁strings ▁( Re he ars al ▁Figure ▁ 2 7 ) ▁and ▁later ▁in ▁the ▁wood wind ▁at ▁Re he ars al ▁Figure ▁ 4 7