Young people, grown-up voices: 'Butterfly' at Wolf Trap

Both Puccini's "Madama Butterfly" and Verdi's "Aida" are about young people -- 15-year-old heroines -- with big, grown-up voices. The Wolf Trap Opera is also about young people with grown-up voices -- just starting out on their professional paths. It produced a concert version of "Aida" earlier this summer with alumni of the program, who showed they'd grown into that opera with aplomb; and on Friday night at the Filene Center, it presented this year's crop of young singers in "Butterfly," which,...