From 1962 to 1982 the Slavko Osterc Ensemble performed successfully under the artistic leadership of Ivan Petrič and established itself as one of the leading chamber orchestras for modern music performance in Slovenia. During its first decade the ensemble toured Yugoslavia, Italy, Germany, France, Belgium, Austria, Poland, the Czech Republic, Romania and Bulgaria and presented for the first time more than 100 pieces by composers from the former Yugoslavia.

In recent years a young generation of Slovene instrumental solo performers has revived the ensemble and they now continue to perform at home and abroad, presenting a contemporary classical repertoire. The ensemble has been invited to the Music Tribune in Belgrade, the Warsaw Autumn Festival and the World Music Days in Ljubljana.