The five instrumentalists who accompanied them were violinist Maurice Welk, oboist Robert Bloom, flutist Julius Baker, 'cellist David Soyer, and keyboard player Sergius Kagen.

[2] Over the years there were changes in personnel: cellist Bernard Greenhouse replaced David Soyer, and keyboard players Erich Itor Kahn and Paul Ulanowsky came after Sergius Kagen.

Several important singers were later guests or regular members, including Jennie Tourel, Lois Marshall, Richard Lewis, Mack Harrell, Jan Peerce, Eileen Farrell, and Maureen Forrester.

[2] Later singers included soprano Carol Webber, altos Jan DeGaetani, D'Anna Fortunato and Mary Westbrook-Geha, tenor David Britton[6] and baritone William Sharp.

In 2001 the membership included flutist Tara Helen O'Connor, Daniel Phillips, Timothy Eddy, Yehudi Wyner, with soprano Beverly Hoch and bass John Stephens.