Alpa Samn Johnson Brooklyn Alpa is the moniker of Samn Johnson, a Michigan-born composer living in Brooklyn. His work as Alpa centers on combining electronics with vocal and instrumental chamber music. It is also an outlet for his interest in historical Indo-European linguistics, with texts in ancient Indo-European languages exclusively used in vocal compositions under the moniker. Alpa is a Hittite word meaning, "a group of clouds". its singular is alpas, from Proto-Indo-European *albhos "white", source of Latin albus, and Greek ἀλφός, "idem".