Iceland Symphony Orchestra has announced its 2026-27 season under Chief Conductor Barbara Hannigan. Here are the vocal performances on offer. Sopranos Álfheiður Erla Guðmundsdóttir and Bryndís Guðjónsdóttir, tenor Elmar Gilbertsson, and Unnsteinn Manuel Stefánsson star in “Our Classics,” a program featuring works by Mozart, Puccini, Bach, Sibelius, Páll Ísólfsson, and Tchaikovsky. The Reykjavík Male Choir also performs. Daníel Bjarnason conducts. {…}