�David Lang's, "love fail" is a meditation on love's timelessness, weaving together details from the Tristan and Isolde story with more modern sources. � The recording also spotlights the vocal quartet Anonymous 4, whose commitment to medieval music and historical scholarship has been acclaimed worldwide. � In a NYTimes review of the BAM performance, Anthony Tommasini wrote: "It was Mr. Lang's music, and the ethereal, pure-toned singing of Anonymous 4, that claimed me in the first section of the piece