Bartłomiej Stańczyk He has completed a number of accordion master classes, including Yiddishe Summer, as well as jazz workshops in Puławy and Compact Jazz Studies in Munich. He has recorded for a number for bands and ensembles such as Caci Vorba, Się Gra, Orkiestra św. Mikołaja, Das Klezmer Orchester, Global Shtetl Band and yidish mambo.