The Slovenian Philharmonic Choir was established as a professional choir under the name the Slovenian Chamber Choir in 1991. Until autumn 2009, it was led by Mirko Cuderman, and for the seasons from 2009/10 to 2011/12 by conductors Martina Batič and Steffen Schreyer. In the 2012/13 season, Martina Batič took over the artistic direction in its entirety till the end of year 2017.
This 40-member choir, which has been part of the Slovenian Philharmonic since 1998, performs an average of 35 concerts each season, and as many different programmes. It focuses primarily on a cappella compositions from various musical periods, which feature especially in the Philharmonic’s Vocal Series, but it also collaborates with the Slovenian Philharmonic Orchestra, as well as other Slovenian and foreign orchestras, in the performance of vocal-instrumental works.
The Slovenian Philharmonic Choir is frequently involved in recording projects. Its substantial discography numbers more than 80 compact discs in the collections Musica sacra Slovenica and Slovenska zborovska glasba, presenting an anthological selection of Slovenian choral music, both sacred and secular. In 2016, the Slovenian Philharmonic Choir was accepted as a member of the Tenso, the European network for professional chamber choir.

With a voice that is warm, wide-ranging and dark-hued, and commanding a repertoire that extends from the baroque to the present day, German-born soprano Sophie Klussman is in demand as a concert singer, as a recitalist and on the opera stage. In recent seasons her engagements have included a world tour of Mozart concert arias with Martin Haselböck and the Wiener Akademie, and performances and recordings of 20th century music with the Berlin’s Scharoun Ensemble, the pianist Oliver Triendl and a variety of other partners. Over her career to date she has collaborated with such conductors as Marek Janowski, Ingo Metzmacher, Helmuth Rilling, Michael Gielen, Michael Sanderling, Karl Heinz Steffens and, in the field of historically informed performance, Marcus Creed, Václav Luks and Attilio Cremonesi. Her career has taken her to such venues as the Berlin Philharmonie, Vienna Musikverein, Zurich Tonhalle, Amsterdam Muziekgebouw, Théâtre du Châtelet in Paris, New York City Center and the Concert Hall of the National Grand Theatre Beijing.
Sophie Klussmann numbers Thomas Quasthoff, Dunja Vejzovic, Margreet Honig and Klesie Kelly-Moog among her mentors. From 2009 to 2011 she was a member of the Halle Opera, singing a variety of soprano role, and in Halle and at the Komische Oper Berlin she gave the world premieres of two operas by the composer Christian Jost. In 2013, at the Baden-Baden Easter Festival, she covered Anna Netrebko in the role of Donna Anna, while 2016 brought her debut as Micaëla (Carmen) in Wuhan, China. She also enjoyed a long-term international collaboration with American actor John Malkovich on the theatre pieces The Giacomo Variations and The Infernal Comedy. Sophie Klussmann is a keen interpreter of song and chamber repertoire and in 2015 her first solo CD, devoted to songs by Karl Weigl, was released on the Capriccio label.