Sergey Ostrovsky is a solo violinist, conductor, founder and first violin of the Aviv String Quartet for 27 seasons, founder and Artistic Director of the ‘Ensemble Symphonique de Genève’ and has taught violin at the Haute Ecole de Musique de Genève and Neuchâtel since 2009. He was First Solo Violin of the ‘Orchestre de la Suisse Romande’ from 2007 to 2012. He was also First Solo Violin of the ‘Orquesta de la Communidad Valenciana’ from 2012 to 2015.

Sergey Ostrovsky won the Grand Prize at the 3rd Melbourne International Chamber Music Competition. He is a laureate of the Bordeaux International String Quartet Competition, 2nd Prize winner of the ‘Schubert and Modernity’ International Competition in Graz (Schubert Prize), as well as a laureate of the ‘Prague Spring’ International Competition and the Rodolfo Lipitzer Prize.

As a soloist, Sergey Ostrovsky plays with prestigious orchestras such as the ‘Orchestre de la Suisse Romande’, the Israel Philharmonic Orchestra, the Geneva Chamber Orchestra, the Cape Town Philharmonic Orchestra, the Amadeus Chamber Orchestra (Poland), the Bournemouth Symphony Orchestra, the ‘Orquesta de la Communidad Valenciana’, the Jerusalem Symphony Orchestra, the ‘Luzerner Sinfonieorchester’ and the Israel Chamber Orchestra.

A passionate conductor, Sergey Ostrovsky is regularly invited to conduct in Switzerland, Spain, Russia, Estonia, Ukraine, Armenia, Georgia, Latvia and Israel.

In 2015, Sergey Ostrovsky created a string ensemble, the ‘Solistes de Neuchâtel’, and in 2023 the ‘Ensemble Symphonique de Genève’. Sergey Ostrovsky's role as artistic director of the’ Ensemble Symphonique de Genève’ is multifaceted, both as an ‘artistic manager’ and as a musician ‘involved’ in the performances. From the latter point of view, he will be able to conduct the orchestra from the podium but also conduct the violin as a soloist.

As a chamber musician, Sergey Ostrovsky has played in the world's most prestigious venues, including Carnegie Hall, Alice Tully Hall, the Louvre Auditorium, the ‘Théâtre du Châtelet’, London's Wigmore Hall and the Sydney Opera House. His ‘Aviv String Quartet’ has also made numerous recordings (Hoffmeister, Dohnanyi, Shostakovich, Schubert, Schulhoff, etc.), some of which have received critical acclaim.

“Annegret Kuttner’s playing is characterised by considerable professionalism and perfection, by her contagious electrifying joy in performing music and by the great stylistic sureness of her interpretation.”
Sächsische Zeitung

„...Kuttner's ... light-fingered playing was impressive for its airy clarity..."
Irish Times

Pianist Annegret Kuttner impresses the audience with the naturalness of her interpretation and the lightness and clarity of her playing.

After successfully participating in the Robert Schumann Piano Competition in Zwickau, Annegret has performed already at the age of 16 as a soloist in concerts in Germany and other European countries, including with the European Union Youth Orchestra. She completed her piano studies at the Dresden Academy of Music with Professor Peter Rösel, and received further musical impetus from masterclasses with Karl-Heinz Kämmerling, Pavel Gililov and Amadeus Webersinke. Annegret augmented her training with postgraduate studies on piano accompaniment (as a répétiteur) with Professor Monika Raithel as well as studying harpsichord with the internationally renowned expert on ancient music, Professor Ludger Remy.

Annegret Kuttner now teaches at the Academy of Music and Theatre, Leipzig.
In addition to her teaching post, the highly sought-after pianist regularly performs as a soloist and chamber musician in diverse musical and cultural centres in Germany and abroad.
Concert tours have taken her to the Czech Republic, Poland, Switzerland, Turkey, Latvia, Ireland, South Africa and the USA.

Annegret performs regularly with Benjamin Schmid, Antje Weithaas, Natalia Prishepenko, Pauline Sachse, Ivan Zenaty and Robert Oberaigner. In New York, she played Beethoven’s complete works for cello and piano together with cellist Peter Bruns. This concert was extremely well received by the public and press alike (New York Sun). Various internationally acclaimed CD recordings are released, including works for cello and piano by Louis Vierne and Charles-Marie Widor, by Robert Schumann and Robert Volkmann as well as for the Beethoven anniversary in 2020 together with Peter Bruns/cello the cycle "Beethoven – Most Complete 1-3“, expanding his known repertoire of five cello sonatas and three sets of variations with another three sonatas and arrangements by Beethoven himself and by composers from his context, for instance the sonata op. 64 (!) and the "Kreutzer“- sonata arrangement for cello by Carl Czerny.

Lukáš Klánský was born in Prague in 1989. As a winner of numerous competitions he has become a sought after soloist and chamber music player. He is a member of the successful Lobkowicz Trio which won the International Johannes Brahms Competition in Pörtschach, Austria, in  2014.   He won the second prize at the Hans von Bülow International Competition 2018 in the conducting from piano category. He regularly performs with violinist Jan Mráček, winner of Fritz Kresiler competition 2014 and concert master of Czech Philharmonic orchestra.

Lukáš Klánský performs with leading Czech orchestras under the baton of conductors such as Libor Pešek, Andrea Sebastian Weiser, Gundi Emilsson or Istvan Denes.  He has played at the Prague Spring Festival, Feasts of Music with Václav Hudeček, Talich’s Beroun  Festival, Prague Dvořák´s Festival, Festival Lago Maggiore, the Mendelssohn Musikwoche Wengen, Chopin Marathon Darmstadt, the Nafplion festival, Il Timbro Ivrea, Basel’s Kammermusik um halb acht,  to name but a few.

He is a laureate of many national as well as international competitions:  Hradec Beethoven Competition, the International Rotary Piano Competition 2012 and the Darmstadt International Chopin Competition 2013. At the age of fifteen he made his debut in the Dvorak Hall in Prague with the Prague Chamber Orchestra playing Mozart’s F Major concerto K459. 

Between 2004 – 2010 he studied at the Prague Conservatoire with Eva Boguniová, graduating with Chopin’s Piano Concerto No 2 in f minor. He finished his studies at the Academy of Performing Arts, where he studied with his father, prof. Ivan Klánský. His musical development has been influenced not only by his tutors but also by Martin Kasík and the internationally renowned  Garrick Ohlsson, whose Prague masterclasses he attended. 

His countless concert performances have served to introduce  himself to audiences in many countries.  In addition to the Czech Republic he is known in Slovakia, Hungary, Germany, Austria, France, Italy, Belgium, the Netherlands, Croatia, Slovenia, Greece, Poland, Turkey, USA and South Africa. His recordings are available on the  Praga Digitals, Radioservis, Gramola and Naxos labels. 

Lukáš Klánský is also conducter and gives concerts conducting Mozart and Beethoven Piano concerti from piano. He studied conducting with Professor Leos Svarovsky.  

Lukas also cooperate with legendary czech violonist Václav Hudeček. They play concerts together and works on summer Academy for young talents in Luhačovice.

Helene Freytag was born into a family of musicians in Leipzig (Germany) in 2005. She received her first violin lessons at the age of five. In 2013, she passed the entrance exam at the Dresden Carl Maria von Weber Academy of Music in the class of Prof. Uta-Maria Frenzel. Currently, she is in the class of Hellen Weiß. Since 2019, she has also been at the Julius-Stern-Institute of the Berlin University of the Arts. There she is taught by Prof. Latica Honda-Rosenberg.From the winter semester 2024/25, she will continue her Bachelor's degree at the MUK in Vienna with Julian Rachlin.

Helene attended master classes with Prof. Mihaela Martin, Prof. Natalia Prishepenko, Prof. Zakhar Bron, Prof. Pawel Vernikov and Prof. Boris Brovtsyn. In addition she is a scholarship holder at the "International Music Academy Liechtenstein" and takes part in the "Intensive Weeks" with Prof. Ana Chumachenco, Prof. Ingolf Turban and Marc Bouchkov.

Helene is multiple first prize winner in the national competition "Jugend musiziert” with highest number of points. In this connection, she received spezial prizes as as soloist, as well as a chamber musician, including a prize of the "Deutsche Stiftung Musikleben", the concert series "Freunde Junger Musiker" and the "WDR3-Klassik radio prize". Together with her sister at the piano she was awarded the 2nd prize at the "Carl-Bechstein-Wettbewerb" in Berlin (2021).

At international level Helene won the 3rd prize at the "International Kocian Competition" in Usti nad Orlici (2019) as well as at the "15th International Violin Competition in Honour of K. Lipinski and H. Wieniawski" in Lublin (2021).

As a soloist Helene performed with the "Staatskapelle Halle", the "Sion Festival Orchestra" and the "Elblandphilharmonie Sachsen", among others. In addition, Helene has a great passion for chamber music. Together with her siblings, she successfully plays piano trio, since 2023 in the class of Prof. Boris Kusnezov at the Hochschule für Musik und Theater Leipzig. Additionally, Helene was a participant in the chamber music projects, such as "Meister von heute und morgen” in Dresden, the "China Youth Music Academy" in Dresden, "Mit Musik-Miteinander” of the Kronberg Academy and the "Geneva international String Academy". There she got inspiration from Prof. Marie-Elisabeth Hecker, Anastasia Kobekina, Prof. Walter Küssner and Sergey Ostrovsky. Since 2019 Helene is a member of the "National Youth Orchestra of Germany".

As a laureat of the 28th competition of "Deutscher Musikinstrumentenfond", she has the honour of playing an Italian violin by L. Ventapane (1806) and being additionally supported by a scholarship as well as concerts of the foundation "Deutsche Stiftung Musikleben". In September of 2022, she was also accepted into the "Studienstiftung des Deutschen Volkes" and the "Hans und Eugenia Jütting Stiftung".

Auguste Rahon was born in 1999 in Reims. He played the cello for the first time at the age of five. At twelve he entered the Conservatoire régional de Lyon and studied there with Augustin Lefebvre. In 2012 he had his first experience as a soloist in Prague with Fauré "Elegie". Since then, he has played regularly in solo recitals, chamber music recitals, solo performances with orchestra and also as a orchestral musician.

In 2016, Auguste started studying in the HEM de Genève, first with Denis Severin (bachelor grade), then with David Pia (master grade). He was a finalist in Murten Classics cello competition in 2018 and laureate of the Marescotti Fondation in 2021. Auguste is currently in residence in the Académie de l'Opéra de Paris.

Cosima Federle was born in Regensburg in 2002 and started playing the violoncello at the age of four.

At 2010 she was admitted to to the "Bayrische Frühförderklasse", Regensburg under Wolfgang Nüsslein and from 2015-2019 she had lessons with Hanno Simons in Munich. In 2019 Cosima became a junior student of Peter Bruns at the “Hochschule für Musik und Theater Leipzig” and continued there as a full student since 2020.

Her playing was enriched by participation in masterclasses taught by Wolfgang Boettcher, Wen- Sinn Yang, László Fenyö, Jan Vogler, Natalia Gutman, Boris Kusnezow, Kian Soltani, Jens- Peter Maintz, Mischa Maisky and Alfred Brendl. Cosima has won various national and international competitions, including first prizes at the "International Dotzauer Competition", Dresden, at the "Làszlò Spezzaferri International Music Competition", Verona, at “Jugend Musiziert“ and 2nd prizes at the "International David Popper Competition“, Hungary and at the "Concours International de Tremplin", Paris, as well as the Music Prize of the City of Regensburg, a special prize by the "Harald Genzmer Foundation" and a Special prize by the German "Bundesapothekenkammer".

In 2013 Cosima and her brother were one of the main protagonists of the movie "Jugend Musiziert- der Film“, which was broadcasted by various German TV channels. She is a scholarship holder of the "Deutsche Stiftung Musikleben" and the "International Music Academy Liechtenstein" and received further scholarships by the "Geneva International String Academy", Switzerland, "Musique à Flaine", France, from the "Hildegard-Schmalzl Foundation" and the "Dresden Music Festival".

Since 2017 she was an annual scholarship holder of the project "Meisterschüler-Meister" in the Neuhardenberg Castle, Berlin with Jan Vogler.

Cosima has played at several festivals, including "Musique en Été", Geneva, "Dresden Music Festival", "Festival Momentum", Stolberg and performed at Elbphilharmonie Hamburg, Stadtcasino Basel and Gewandhaus Leipzig.

She produced several recordings with the “Bayrischer Rundfunk“, “Deutschlandfunk“, “Norddeutscher Rundfunk“ and “Radio Berlin Brandenburg“.

Cosima plays a cello by Nicolas Lupot, Paris 1821, that has been given to her as a loan by the “Deutsche Stiftung Musikleben“.