Americana with Niels Koopmans, 2016.
Gregor's klezmer composition A Freylakhe Pastukhl, performed by Shtetl Band Amsterdam with Christian Dawid in 2011.
Klezmer concert suite, performed by Shtetl Band Amsterdam in 2009.
Bass lines and percussion on the bassetto, accompanying two singers, 2008.
Rare performance where Gregor played the hand drum in a Spehardic song, 2008.
Amari Szi Amari, performed by Csokolom in 1999 in Monterey, California.