The Criterion Quartet

Shannon Four

Collegiate Choir

Reinald Werrenrath

Chór Opery Warszawskiej

Fisk University Male Quartette

Alma Gluck

John McCormack

Charles Harrison

Homer Rodeheaver

Henry Burr

Trinity Choir

St. John's Gospel Quartette

Reed Miller

Metropolitan Quartet

Virginia Asher

Norfolk Jubilee Quartet

John Forsell

Chautauqua Preachers' Quartette

Lyric Quartet

Vivian Bennett's Choir

Vernon Dalhart

Elsie Baker

Emilio De Gogorza

George Alexander