Lutosławski Piano Duo are Emilia Sitarz and Bartek Wąsik, known for their award-winning performances of chamber music, as well as many prestigious appearances in concert halls, such as Carnegie. Together with percussionist duo Hob-beats (Magdalena Kordylasińska and Miłosz Pękala) they form Kwadrofonik. At Unsound 2015 they perform the music of Julius Eastman and Tomasz Sikorski in the "Unchained" program, which they also play on the Bolt Records album release of the same name.