Invited to join the Philadelphia Orchestra under the direction of Eugene Ormandy he performed regularly in Philadelphia with the Orchestra. In 1951, Filar recorded renditions of six nocturnes, Chopin's Sonata in B Minor, for the now-defunct Colosseum Record Co. in New York City.
Filar was invited to join the Philadelphia Orchestra under Eugene Ormandy's direction and performed frequently with them in Philadelphia. In 1951, he recorded Chopin nocturnes and his Sonata in B Minor for the now-defunct Colosseum Record Co. in New York City.