▁forty - five ▁notes , ▁and ▁the ▁proport ions ▁gover ning ▁the ▁structure ▁of ▁individual ▁pieces ▁include ▁fra ctions ▁as ▁well ▁as ▁natural ▁numbers . ▁Son at as ▁and ▁Inter l udes ▁was ▁inspired ▁by ▁C age ' s ▁interest ▁in ▁Indian ▁philosophy ▁and ▁the ▁R asa ▁a est h etic ▁as ▁explained ▁in ▁An anda ▁K . ▁Co om ar as w amy ' s ▁writ ings . ▁The ▁pieces ▁express ▁the ▁eight ▁" per man ent " ▁emot ions ▁( the ▁hum orous , ▁the ▁w ond r ous , ▁the ▁er otic , ▁the ▁hero ic , ▁anger , ▁fear , ▁dis g ust ▁and ▁sorrow ) ▁and ▁their ▁common ▁t endency ▁toward ▁tran qu ility . ▁ ▁Music ▁for ▁Works ▁of ▁Cal der ▁Com posed ▁in ▁ 1 9 5 0 ▁for ▁Herbert ▁M atter ' s ▁short ▁film ▁on ▁sculpt or ▁Alexander ▁Cal der , ▁Works ▁of ▁Cal der . ▁The ▁idea ▁of ▁the ▁film ▁was ▁suggested ▁by ▁Burg ess ▁Mer ed ith , ▁whom ▁Cal der ▁met ▁in ▁ ▁spring ▁ 1 9 4 8 . ▁The ▁decision ▁to ▁ask ▁M atter ▁to ▁direct ▁was ▁Cal der ' s : ▁the ▁two ▁had ▁worked ▁with ▁each ▁other ▁previously ▁when ▁M atter ▁made ▁photograph s ▁of ▁Cal der ' s ▁works . ▁The ▁ 2 0 - min ute ▁color ▁film , ▁produced ▁and ▁narr ated ▁by ▁Mer ed ith ▁( n arr ation ▁by ▁John ▁Lat ou che ) ▁and ▁photograph ed ▁and ▁directed ▁by ▁M atter