▁most ▁important ▁pieces ▁of ▁his ▁works ▁are ▁as ▁follows : ▁Kon cert ▁per ▁piano ▁d he ▁or k ester ▁nr . ▁ 1 ▁= ▁Con cer to ▁for ▁P iano ▁and ▁or chestra , ▁nr . ▁ 1 , ▁ 1 9 7 6 ▁K ec at ▁d he ▁u j ku ▁= ▁The ▁Go ats ▁And ▁The ▁Wolf , ▁bal ley , ▁ 1 9 7 9 ▁Kon cert ▁per ▁Vi ol on cel ▁d he ▁or k ester ▁= ▁Con cer to ▁for ▁Vi ol on cel lo ▁and ▁or chestra , ▁ 1 9 8 2 ▁S inf oni ▁nr . ▁ 1 ▁= ▁Sym phony ▁nr . ▁ 1 , ▁ 1 9 8 5 ▁S inf oni ▁nr . ▁ 2 ▁= ▁Sym phony ▁nr . ▁ 2 , ▁ 1 9 8 8 ▁O irat , ▁ 2 0 0 0 ▁ 1 2 ▁Cart es ius ▁Cant us , ▁piano ▁cycle , ▁ 2 0 0 2 ▁E tera ▁t onda , ▁ac oust ic ▁and ▁electro - ac oust ic ▁music , ▁+ ▁installation , ▁ 2 0 0 6 ▁P iano ▁con cer to ▁nr . ▁ 2 , ▁ 2 0 0 7 ▁Besides ▁these ▁he ▁composed ▁r haps od ies , ▁movie ▁sound tra cks , ▁pieces ▁for ▁piano , ▁pieces ▁for ▁voice ▁and ▁some ▁electro ac oust ic ▁music . ▁ ▁External ▁links ▁D etailed ▁bi ography ▁of ▁Aleks and ë r ▁Pe ç i ▁( F rench ) ▁Biography ▁of