"Aria", "Zwiegesang" and "Interlude" from the comic opera "Sedkák Jakub" ("Peasant Jacob") "Aria", "Zwiegesang" and "Interlude" from the comic opera "Sedkák Jakub" ("Peasant Jacob") Main opus "Sedlák Jakub" ("Peasant Jacob"), comic opera in 3 acts, libretto by Ladislav Novák, based on Lope de Vega