Carsten Nicolai (18 September 1965), also known as Alva Noto, is a German musician and visual artist. He is a member of the music groups Diamond Version with Olaf Bender (Byetone), Signal with Frank Bretschneider and Olaf Bender, Cyclo with Ryoji Ikeda, ANBB with Blixa Bargeld, ALPHABET with Anne-James Chaton, Opto with Thomas Knak, and Alva Noto + Ryuichi Sakamoto with whom he composed the score for the 2015 film The Revenant.