Trio Apollon: Three renowned personalities in music, soloists of the Berlin State Opera Orchestra under the leadership of Daniel Barenboim founded an exceptional piano trio. Matthias Glander (clarinet), Felix Schwartz (viola) and Wolfgang Kühnl (piano). http://musicalworld.com/groups/trio-apollon/biography.html https://www.gramophone.co.uk/review/trio-apollon-works-for-clarinet-viola-and-piano