Artem Stolyarov ( Russian: Артём Столяро́в, [ɐrˈtʲɵm stəlʲɪˈrof]; born 28 September 1989), known professionally as Arty and Alpha 9, is a Russian DJ and music producer. He has collaborated with Armin van Buuren, Above & Beyond, BT, Paul van Dyk, Mat Zo, OneRepublic and Matisse & Sadko. His debut alb