Czech viola player, born 1972. He studied at the Prague Conservatory in the class of prof. Jaroslav Ruis and at the Academy of Performing Arts in Prague with prof. Lubomír Malý and attended master classes , led by Norbert Brainin, Sigmund Nissel, Thomas Kakuska. He is a member of Suk Chamber Orchestra, in which he has headed the viola section for many years. Moreover, he is a founding member of Heroldovo Kvarteto, with whom, over the 15 years of their existence, he has performed throughout Europe, Asia, USA and Australia. At present, Karel Untermüller teaches at the Teplice Conservatory and at the Academy of performing Arts in Prague.