The Philadelphia Singers, an American choir based in Philadelphia, Pennsylvania, was founded by Michael Korn over 1971â1972. The ensemble gained early recognition for featuring on the first commercial recording of George Frideric Handel's Roman Vespers. Under Korn's direction until his death in 1991, the choir built its reputation. David Hayes succeeded Korn as music director from 1992 to 2015. In 2001, The Philadelphia Singers was named "Resident Chorus of The Philadelphia Orchestra." They performed United States premieres by Sir James MacMillan and world premieres by Daniel Kellogg and Jennifer Higdon. The ensemble ceased operations in May 2015 due to rising costs and lack of funding sources.