In the a cappella world, singers are on a constant quest for the unmistakable “wall of sound,” formed only when voices lock chords in perfect harmony. The Ambassadors of Harmony® (AOH) is the St. Louis area’s premier men’s a cappella chorus of more than 100 voices known for powerful and musically masterful performances. Its repertoire includes Broadway classics, barbershop, jazz, pop and a wide selection of holiday favorites. The Ambassadors of Harmony® chorus seeks to change the lives of audiences worldwide through artistic and emotionally driven a cappella performances. AOH also strives for musical excellence and to promote the barbershop style.