Bandcamp In October, Austin's brooding balladeer Bill Callahan teamed with equally enigmatic auteur Bonnie Prince Billy to release a surprise cover of Cat Stevens' "Blackness of the Night," with arrangements by Drag City labelmate Azita Youssefi. The singles have continued weekly since, each a new cover and collaboration, ranging from pop busters (Steely Dan's "Deacon Blues" with Bill MacKay; Billie Eilish's "Wish You Were Gay" with Sean O'Hagan) to more obscure (Johnnie Frierson's "Miracles" filtered through Ty Segall; Lowell George's "I've Been the One" with Meg Baird). Amid Lou Reed's "Roo...