Known for their surprising, often genre-bending programs, the Kronos Quartet hit Napa this week opening with “Aheym (Homeward),” written specifically for the avant-garde classical quartet by Bryce Dessner, guitarist and songwriter for the National. What follows is a journey through the farthest bounds of tradition and experimentalism, with pieces by Laurie Anderson (“Flow”), Mexico’s Café Tacuba (“12/12”) and the Prelude from Tristan und Isolde by Wagner. After intermission, the group tackles “La Sidounak Sayyada, or I’ll Prevent the Hunters from Hunting You,” by Omar Souleyman, Syria’s premiere wedding singer. Not afraid of pairing like with unlike, Kronos follows Souleyman with “Flugufrelsarinn” by Icelandic masters-of-the-soaring-melody Sigur Rós. The Kronos Quartet play on Friday, Jan. 11, at the Napa Valley Opera House. 1030 Main Street, Napa. 8pm. $40-$45. 707.226.7372.