Glass Duo are a musical group formed by the Polish couple Anna and Arkadiusz Szafraniec. They play the glass harmonica, a rare and extraordinary musical instrument. It is the only glass playing group in Poland and one of the few professional ensembles in the world. They lend themselves to playing in pairs, as well as with chamber orchestras or symphony orchestras. Furthermore, the Glass Duo instrument is, by extension, almost 5 octaves, among the largest in the world.
The duo has performed in major events in Italy, Germany, Belgium, India, Austria, Lithuania, the United States and Russia.