Using the English translation of the Le Mystère des Voix Bulgares name which had been formally granted to them by original compiler Marcel Cellier, on 2018’s BooCheeMish the Bulgarian State Television Female Vocal Choir featured a guest singer who like them first came to wider attention thanks to 4AD in the 1980s, Dead Can Dance’s Lisa Gerrard. Most of the songs are based around the choir’s always remarkable work itself, but Gerrard’s various appearances further electrify on songs like “Pora Sotunda,” “Unison” and “Shandai Ya.”