The piece was composed for the Klezmer Orchestra of the Sejny Theatre. It is called Sejny Dances and is the fusion of traditional folk and contemporary music based on improvisation. Michał Fetler is one of the best Polish saxophone players and a member of several bands and music projects including the internationally acclaimed Młynarski&Masecki Jazz Band.
In order to read more about the cooperation of Michał Fetler and the Klezmer Orchestra see here.
To read more about the rehearsals of Senjy Dances see here.