Grzech Piotrowski (Artist, composer, saxophonist, record producer and arranger)
He is constantly balancing on the edge of the film music, classical, jazz, ethnic and open improvisation. He graduated from the prestigious faculty of Jazz and Contemporary Music at the Academy of Music in Katowice.

He is founder of the World Orchestra (www.worldorchestra.org), the owner of Alchemik Records as well as concert network Jazz in Poland (www.jazzinpoland.com)

Nominated for the Fryderyk Award (Local IFPI) in 2012, 2013, 2012 and for the Matthew Award (Polish Radio).

Winner of the Grand Prix at the Hoeilaart Jazz Festival in Belgium in 1998 and the Grand Prix at the Two Theatre Festival (Sopot).

He was awarded at the festivals: "Jazz on the Oder", "Pomeranian Jazz Autumn", "Jazz Juniors". Besides World Orchestra, he was leader and founder of formations: The Alchemik, Oxen, Jazz Deconstruction, Freedom Nation, Head Up.

He co-operates with: Theodosii Spassov, Ruth Wilhelmine Meyer, Bulgarian Voices Angelite, Karen Edwards, Arild Andersen, Jon Christensen, Eivind Aarset, Terje Isungset, Marcin Wasilewski, Sainkho Namtchylak, Liz Rosa, Sadia Youssouf, Espen Leite, Lars Andres Haug, Akku5, Vladiswar Nadisha, Azat Bikchurin, Michal Baranski, Robert Luty, Sebastian Wypych, Bram Stadhouders, Rahul Popham, Sergei Starostin, Taisia Krasnopevtseva Atom String Quartet, Sebastian Karpiel Bułecka, Wu Wei, Sinikka Langeland, Marcel Comendant, Jeno Lisztes, Rafal Sarnecki, Wieslaw Pieregorólka, Collective Big Band.