The quartet of clarinetist Piotr Mełech, bassist Jarosław Majewski, pianist Jakub Królikowski and Jacek Buhl—well-known and experienced musicians from the Polish jazz scene—draws on the formula of traditional jazz quartets, enriching it with the use of clarinets, self-made percussion instruments and heavy European free jazz influences. The project debuted with an album released in 2019, simply called Kwartet.