During the summer, Leszek ‘Hefi’ Wiśniowski has created the Sound of MOCAK Summer 2019 sound installation in MOCAK outdoor space. The artist, improvising on the bass clarinet, using mainly the low register of instruments and multiphones – by extracting two or more sounds from wind instruments at the same time – has provided a complementation for the Museum's audial landscape. The work is intended to be a backdrop embedded in the aesthetics of contemporary music that  resonates with the architecture, as well as MOCAK visitors and the natural sounds of the surroundings. The project takes place between 5 July and 23 September 2019 (no specific days or hours are set).

Leszek ‘Hefi’ Wiśniowski – flutist, saxophonist, clarinetist and composer. He mainly plays jazz and contemporary music. He teaches a flute class in jazz music at the Jazz and Percussion Contemporary Music Department of the Academy of Music in Krakow. He is a member of the National Flute Association and the Music Centre Association. He has recorded four of his own albums and participated in the creation of 30 others. He has performed solo parts on the soundtracks of nine films with music by Krzesimir Dębski and Zygmunt Konieczny. He works closely with world-famous jazz and avant-garde flute artists Jamie Baum and Robert Dick.  He has given concerts and recorded in Asia, America and Europe. www.hefi.pl