Since Grammy-winning San Francisco Symphony Chorus Director Ragnar Bohlin founded his own top-flight chamber choir Cappella SF in 2014, a new dimension of a cappella choral excellence has graced the Bay Area's (and the USA's) musical scene. Timeless—the ensemble's third album for Delos—offers choral fans and history-minded classical music aficionados a rare smorgasbord of choral compositions encompassing every musical period of the past millennium. Selections range from the chant-based music of Hildegard von Bingen and Guillaume de Machaut to stunning pieces by such distinguished living composers as Arvo Part, Eric Whitacre, Frank Ticheli and Ola Gjeilo—and all points in between.