On paper, a collaborative album by a singer-songwriter and a sludge metal band seems unusual. To those in the know, however, it makes complete, perfect sense. Neither featured act on May Our Chambers Be Full are strangers to collaboration; Emma Ruth Rundle has been a member of experimental bands the Nocturnes, Red Sparowes and Marriages, and provided backing vocals on Thrice’s 2018 album Palms, while Thou have released a litany of split 7” and EPs with various peers, and in 2015 released You, Whom I Have Always Hated a collaborative full-length album with fellow doom merchants, The Body. More to the…