Dirección
Reparto y equipo
Judith WeirSelf - Commentary (voice)The Hilliard EnsembleThemselvesSpecial FeatureThemselves - Barbershop QuartetJohnnie MooreSelfThe DriftersThemselvesEmmit Powell & The Gospel ElitesThemselvesCourtney HallSelfThe Esterhazy QuartetThemselvesSteve MartlandThemselvesThe Britten QuartetThemselvesPeter ManningSelfKeith PascoeSelf
Andrew ShulmanSelfJohn LewisSelf
Modern Jazz QuartetThemselves (archiveFootage)
Adam ClaytonSelf
U2ThemselvesThe Rova Saxophone QuartetThemselvesLarry OchsSelfSteve AdamsSelfTerry RileySelfJohn RaskinSelfKronos QuartetThemselvesJohn SherbaSelfDavid HarringtonSelfFranghiz Ali-ZadehSelfHank DuttSelf