An independent concert promoter in Zürich, run by Patrick Neuenschwander, which presents the «Masterinterpreten» series in the grosser Saal of the Tonhalle. Each edition carries an opus number and brings a visiting orchestra together with soloists — the violinist Maria Solozobova has been a recurring presence — in programmes that set familiar masterworks beside less often heard pieces. The series has run since the 2010s, for a time at the Tonhalle Maag during the rebuilding of the main hall.