sentences:  He was a founder-member of such chamber ensembles as the "Wiener Bläserensemble" (Vienna Wind Ensemble), "Wiener Virtuosen", and the "Wiener Solisten Trio".His eldest son Daniel Ottensamer (born 26 July 1986) became co-principal clarinetist with the Vienna Philharmonic alongside his father, and his youngest son Andreas Ottensamer (born in 1989) is principal clarinetist of the Berlin Philharmonic.Together with his sons Daniel and Andreas, the three of them formed a clarinet ensemble, The Clarinotts.