▁his ▁" Met am orph oses ▁I ▁and ▁II ▁of ▁Old ▁Czech ▁song ▁Lord ▁, ▁have ▁mer cy ▁of ▁us ". ▁Met am orph oses ▁I ▁is ▁the ▁composition ▁for ▁sym ph onic ▁or chestra ▁and ▁piano , ▁Mat am orph oses ▁II ▁are ▁the ▁" a ▁cap ella " ▁variations . ▁Also ▁Leo š ▁Jan á č ek ▁used ▁this ▁theme ▁in ▁one ▁of ▁his ▁works ▁- ▁H ospod ine , ▁pom il uj ▁ny ▁( L ord ▁Have ▁Mer cy ▁Upon ▁Us ) ▁for ▁Solo ▁Quart et ▁and ▁M ixed ▁Double ▁Ch oir ▁with ▁accompan iment ▁of ▁Organ , ▁Har p , ▁ 3 ▁Trump et , ▁ 4 ▁T rom b ons ▁and ▁T uba . ▁ ▁References ▁ ▁Fr anti š ek ▁V ác lav ▁Mare š : ▁" Cy ril omet od ě j ská ▁trad ice ▁a ▁s lav ist ika ", ▁Prag ue , ▁Tor st , ▁ 2 0 0 0 , ▁. ▁P ages ▁▁ 4 0 3 — 4 7 6 ▁contain ▁in - depth ▁study ▁of ▁the ▁song . ▁ ▁External ▁links ▁ ▁Czech ▁and ▁Latin ▁text ▁ ▁Ph oto ▁of ▁the ▁oldest ▁recorded ▁musical ▁notation ▁( scroll ▁down ) ▁ ▁Modern ▁musical ▁notation ▁( text ▁in ▁Japanese ) ▁ ▁Category : C zech ▁anth ems ▁Category : C zech ▁Christian ▁h ym ns ▁Category : C zech ▁songs ▁Category : C zech ▁early ▁music <0x0A> </s> ▁William ▁S age ▁Rap son ▁( 1 4 ▁August ▁ 1 9 1 2 ▁–