Czech opera

This week’s Sunday Opera (4/12 3:00 p.m.) is turning to the work of a mostly forgotten Czech composer, Pavel Haas through his only opera, written in 1936, “Sarlatan,” “The Charlatan.”

Desire versus reality on this week’s Sunday Opera (3/15 3:00 p.m.) as we look to a 1938 work by Bohuslav Martinu that was based on a French surrealist play by Georges Neveux entitled “Juliette, or the Key of Dreams.” “Julietta” is the object of desire of a travelling bookseller, and he travels to the world of dreams to find her, even though he’s never seen her. He’s just heard her singing.