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.

HunJu Sohnn, Korean born pianist, has been performing both solo and chamber music concerts in Switzerland, England, Germany, France, South Korea, Thailand, Costa Rica, as well as throughout the United States.

Highly appreciated for her qualities in collaborative work, HunJu has been invited to appear with various instrumentalists and performed with the wind ensemble Ensemble Five ±, as well as the European-based Varias Ensemble at the New Year’s Music Festival in Gstaad, Switzerland. HunJu has collaborated in masterclasses for world-famous artists such as Pinkas Zukerman, Nobuko Imai, Kyung-Wha Chung, Tabea Zimmermann, Yuri Bashmet, as well as Yo-Yo Ma, Franz Helmerson, and Ralph Kirshbaum. She has been the pianist/coordinator of the viola masterclass at the Verbier Music Festival and Academy. HunJu has participated in a television documentary featuring Nobuko Imai, which was distributed worldwide and performed with Ms. Imai for France Musique Radio program during the Verbier Festival.

HunJu Sohnn continues to perform in Europe and the US, while holding a teaching position at the Conservatoire Populaire de Musique Danse et Théâtre in Geneva. She also participated in studio recordings, most recently in a project of complete works for piano and winds by Francis Poulenc released by Kleos Classics. HunJu Sohnn received her Master's degree from New England Conservatory and holds a Doctoral degree for Piano Performance from Rice University.

“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.

Natalia Grines is a graduate of the Nizhny Novgorod piano school. In 2004 she graduated the Nizhny Novgorod State Glinka Conservatory (Academy) with professor Bella Alterman. In 2006 she followed her post-graduate courses at the chamber music faculty (studio of Natalia Matveeva) and straightaway began to work at the homeland Academy, where she was working until her repatriation to Israel in 2022.

Being a professor of music (chamber music and piano duo departments), she brought up a lot of students – prize winners of international piano competitions, served in jury in different contests, travelled with master-courses all over Russia, as well as in Armenia, Bosnia, South Africa, Spain, USA.

Natalia has performed in Russia, Israel, USA, Taiwan, Spain, Italy, Bosnia and Herzegovina, South Africa, Armenia, Ukraine.

At the XVI International Tchaikovsky Competition (2019) she played together with a cellist Anastasia Kobekina, who was eventually awarded the title of the 3rd prize winner. Natalia also took part as an accompanist of the XIII and XV Tchaikovsky competitions and was awarded the diploma of the best accompanist.

Since 2007 she was regularly collaborating with Vladimir Spivakov foundation.

Since 2016 Natalia has been tutoring a chamber ensemble at the AIMS Academy-Festival in Catalonia (Spain). She is also taking part at the Keshet Eilon string Academy as an official accompanist.
In 2017 together with Evgeny Brakhman and the Taiwan Symphony Orchestra of soloists, she took part in a series of concerts in Taiwan, including a performance in one of the best halls in the world - Taipei National Concert Hall.

Among Natalia’s chamber partners are violinists Alena Baeva, Daniel Lozakovitch, Sergey Ostrovsky; trumpetist Sergey Nakariakov, clarinetist Valentin Urupin, cellists Anastasia Kobekina, Alexander Ramm, Boris Andrianov, Zvi Plesser and others.

Since 2016, together with Evgeny Brakhman, Natalia has been a founder and codirector of the unique festival and art project in Russia - “Musical Landscapes” www.musiclandscape.ru The project combines arts of music and painting, consists of concerts with world-famous classical artists and mastercourses. In 2022 the 5th edition of “Musical Landscapes” brought together more than 150 participants.

Born in Alabama to a Korean-American family, violinist Haeun Honney Kim has established herself as a versatile and accomplished artist, recognized for her performances as a soloist, chamber musician, and orchestral leader across more than twenty countries. Since 2022, she has been a member of the LGT Young Soloists, where she serves as the leader of second violins and regularly appears as a featured soloist. She has performed in some of the world’s most prestigious concert halls, including Carnegie Hall, Konzerthaus Berlin, Musikverein Vienna, Elbphilharmonie Hamburg, Tonhalle Düsseldorf, Concertgebouw Amsterdam, Melbourne Recital Centre, Victoria Hall Singapore, Tonhalle Zürich, and Lotte Concert Hall in Seoul.

Honney began violin studies at the age of four, inspired by her pianist mother, and quickly gained national recognition. She is a prizewinner of numerous competitions, including the Blount-Slawson National Young Artist Competition, Lois Pickard Competition, YoungArts, Hilton Head Symphony Orchestra Concerto Competition, Leopold Auer International Violin Competition, and was a semifinalist at the Cooper International Violin Competition. At age eleven, she made her solo debut with the Louisiana Philharmonic Orchestra, and has since appeared with the Alabama Symphony Orchestra, Hilton Head Symphony Orchestra, Delta Symphony Orchestra, Southern Adventist Orchestra, and the Georgia Philharmonic Orchestra.

Her artistry has also been shaped through participation in internationally renowned festivals and academies, including the Grafenegg Academy Orchestra, Fiskars Summer Festival, Korean National Symphony Orchestra Academy, Masterclass Apeldoorn, Schleswig-Holstein Music Festival, Sarasota Music Festival, Rencontres Musicales Camerata Lysy, Orchestre National des Jeunes du Luxembourg, Aspen Music Festival, New York String Orchestra Seminar, and the National Youth Orchestra of the United States.

An experienced orchestral leader, Honney currently serves as the Violin Fellow of the Montgomery Symphony Orchestra, and has held concertmaster and leadership positions under distinguished conductors such as Marin Alsop, Jörg Widmann, David Reiland, Manfred Honeck, Jukka-Pekka Saraste, and Jaime Laredo.

She studied at the New England Conservatory and the Juilliard School, and is currently pursuing her Master of Music in Violin Performance at the Hochschule für Musik Hanns Eisler in Berlin, Germany.

Sherzod Abdiev was born in Tashkent, Uzbekistan, in 1999 and began studying the violin at age 6. He attended the Academic Music High School under the Moscow State Conservatory, studying with L. Slavyanova, then the YST Conservatory of Music under Professor Qian Zhou, and currently studies with Professor Sergey Ostrovsky at HEM Geneva-Neuchâtel.

He performed a recital with the State Symphony Orchestra of Uzbekistan in Tashkent at age 19 and won first prize in the 'Merzlyakovka priglashaet' competition in Moscow (2018), first prize in the 'III Marine Iashvili International Competition' in Tbilisi, Georgia (2025), and third prize at the '13th Marie Cantagril International Violin Competition' in Toulouse, France (2025). In addition, he was a semifinalist in the Odesa and Markneukirchen International Violin Competitions, where he received a special prize from iPalpiti Artists International provided by E. Schmieder (2025).

He has participated in masterclasses with Ilya Kaler, Dora Schwarzberg, Sergey Ostrovsky, Shlomo Mintz, Dmitriy Berlinskiy, Krzysztof Wegrzyn, Koichiro Harada, Tatiana Samuil, Sarah Nemtanu, Guillaume Chileans, and others. He took part in the Keshet Eilon Summer Mastercourse in 2022 and 2025.

He plays a Petrus Gaggini violin generously loaned by the LaLive Foundation (Geneva).

Lénaëlle Planat hails from Grenoble, where she began her violist's studies.  At the age of 17, she entered the CNSMDL (Conservatoire National Supérieur de Musique et de Danse de Lyon, France) in the class of John Stulz and Fabrice Lamarre for her Bachelor's degree, and has since taken part in various masterclasses, notably with Kim Kashkashian, Antoine Tamestit, Jean Sulem, Pauline Sachse and Thomas Riebl. She has also studied in Vienna with Jennifer Stumm during one year of international exchange.

Currently in the last year of her Master's degree, she won first prize and Clara Levillain Prize at the French national competition for young violists in 2023, as well as the prize for the best interpretation of the contemporary work. She joined the 'Orchestre Français des Jeunes' (OFJ) as co-soloist violist.

Passionated about chamber music, she co-founded the Misia Quartet in 2023, with whom she will study in Paris for the next years. They benefit from the teaching of musicians from the eminent Casals, Danel, Rosamund, Béla and Diotima quartets, and they perform together at the Lyon Auditorium, among other venues.

She is also involved in various interdisciplinary projects, and over the past three years has taken part in the creation of several contemporary pieces and choreographed performances.

Sophie Kiening is a German violist based in Frankfurt am Main. She studied with renowned musicians including Tabea Zimmermann, German Tcakulov, Pauline Sachse, and Jean Sulem, and is currently pursuing a Master’s degree in chamber music under the guidance of Tabea Zimmermann.

She has received additional artistic inspiration from Prof. Sào Soulez Larivière, Prof. Simone von Rahden, and Prof. Roland Glassl. A multiple first-prize winner at the Bundeswettbewerb Jugend Musiziert, Sophie was awarded the Deutschlandstipendium by the Hochschule für Musik “Hanns Eisler” Berlin for three consecutive years. She subsequently received scholarships from the Hans and Eugenia Jütting Foundation and the Rotary Club Siena, as well as first prize at the XV International Szymon Goldberg Competition in 2024.

In 2025, she was awarded a scholarship at the Deutscher Musikwettbewerb, where she was also admitted to the concert promotion program and received a special prize from the Deutsche Stiftung Musikleben.

Sophie has a particular passion for exploring unconventional chamber music formations and discovering lesser-known repertoire. Recent engagements include performances at the Con Spirito Festival Leipzig (2025), the Schwetzinger SWR Festspiele in a viola quartet alongside Tabea Zimmermann, Jelena Antić, and Arcan İsenkul, participation in Sol Gabetta’s CD production “Lise Christiani” with Cappella Gabetta, and a string sextet performance at Musique à Flaine.

Swiss cellist Jonathan Gerstner was born on the shores of Lake Geneva in 2003. He began playing the cello at the age of five with Aude Pivôt, continued his path with Martin Reetz at the Lausanne Conservatoire and from 2020 studied with Patrick Demenga at the Haute Ecole de Musique de Lausanne (HEMU). Since 2022, he has been studying with Reinhard Latzko in Austria at the Vienna University of Music and Performing Arts (mdw). From 2025 he also studies with Julia Hagen and in 2026 wins the first prize of the 1st Heinrich Schiff Competition there. Further valuable input came from Jens Peter Maintz, Peter Bruns, Thomas Grossenbacher, Valentin Erben, Troels Svane, Marc Coppey and Pieter Wispelwey among others.

Jonathan has been part of the 2024 Verbier Festival Orchestra (VFO), playing under the direction of conductors like Sir Simon Rattle, Antonio Pappano and Klaus Mäkelä.

Highly passionate about chamber music, he has studied with teachers such as Vincent Coq in Lausanne and currently Johannes Meissl and Stefan Mendl in Vienna, as well as receiving invaluable advice from Eckart Runge, Hatto Beyerle, Avedis Kouyoumdjian, Patrick Jüdt and Dirk Mommertz within the European Chamber Music Academy (ECMA). In 2025, as part of the Cuore Piano Trio, he won the first prize along with a special prize at the 10th International Johannes Brahms Chamber Music Competition in Gdańsk.

In recent years Jonathan performed on stage with artists such as Sergey Ostrovsky, Noémie Bialobroda, Marko Ylönen, Jean-Sélim Abdelmoula, Patrick Demenga, Philippe Graffin and Reinhard Latzko. As a soloist and chamber musician, he has appeared on all four of Switzerland’s national classical radio stations, and performed at international festivals and concert venues including the Geneva International String Academy, Musikverein Wien, Prague Spring Festival, Cello Biënnale Amsterdam, Lavaux Classic, K&M Festival Stavanger, Loisiarte, Beethovenhaus Baden and the Musikfestwoche Meiringen.

Philadelphia-born cellist Eliana Razzino Yang has performed solo recitals in London, Paris, Rome, Brussels, Frankfurt, New York, Helsinki, Boston, and Philadelphia and concertos with orchestras in Italy, across the US, and England. She has also performed as part of Harrisburg’s Market Square rising star series and the Taos Chamber Music Group, and has received top prizes in the Adelphi Orchestra, All City Orchestra, YCVT, Caprio, Charleston, and Vivace competitions.

Eliana has collaborated with members of the Emerson, Tokyo, Borromeo, Vermeer, Audubon, Aizuri, and Momenta string quartets, Ensemble Epomeo, Chamber Music Society of Lincoln Center, and the International Contemporary Ensemble (ICE). Recital partners include pianists Ieva Jokubaviciute, Amy Yang, and Clare Hammond.

In 2015 she traveled to Budapest, Hungary, to play for composer György Kurtág and cellist Miklós Perényi and in 2016 she played for composer George Crumb. Past programs include IMS Prussia Cove, La Jolla Music Society Fellowship, Norfolk Chamber Music Festival, Taos School of Music, Kneisel Hall, Perlman Music Program, Sarasota Music Festival, Heifetz Institute, Castleman Quartet Program, Thy Chamber Music Festival, Colorado Music Festival, Meadowmount School of Music, and Carnegie Hall’s New York String Orchestra Seminar.

Eliana received her bachelor’s and master’s degrees from Juilliard under the tutelage of Natasha Brofsky, Richard Aaron, Zvi Plesser and Clara Kim.

Born in 2004, Matteo Fabi began studying the cello with his father at the age of nine, then continued his training at the Conservatory “G.F. Ghedini” in Cuneo, graduating with top marks, honors, and a special mention under the guidance of Andrea Cavuoto. 

In recent years, he has perfected his skills with Antonio Meneses at the Stauffer Academy in Cremona and the Chigiana Academy in Siena, and with Jing Zhao at the Solo Music course in Bologna. In 2025, after only two years instead of the expected three, he obtained his Artist Diploma with top marks and honors at the Accademia Nazionale di Santa Cecilia under the guidance of Giovanni Sollima, with whom he had already studied from 2017 to 2020 at the Accademia “R. Romanini” in Brescia. He currently attends the Robert Schumann Hochschule in Düsseldorf under the guidance of Pieter Wispelwey. 

He has performed solo recitals and concerts in various chamber ensembles, from duos to sextets, for important festivals and associations such as Amici di Paganini, Festival Back to Bach, Classiche Armonie, Toret Artist TreSeiZero, Chigiana Summer Festival, Amici della Musica di Mestre, as well as having appeared several times as a soloist with orchestra (concertos by C.P.E. Bach, Haydn, Tchaikovsky, Schumann, Dvorak, and Gulda). He regularly collaborates with Salvatore Accardo, with whom he has already performed at the Museo del Violino in Cremona, the Teatro dei Rozzi in Siena, and the Teatro Toniolo in Mestre. Since 2025, he has been a member of the Trio Ares, with whom he attends the masterclass held by Ivan Rabaglia at the Accademia Nazionale di Santa Cecilia. He collaborates as principal cellist with the Turin Philharmonic Orchestra. 

He has won prizes in various national and international competitions, including the Milan International Cello Competition (1st prize), the Verão Clássico Academy Award (1st prize), the Crescendo Prize in Florence (1st prize and prize for best cellist), Rome Grand Prize Virtuoso International Competition (1st prize), and the European Music Competition City of Moncalieri (1st prize overall). He has received the prestigious De Sono Association scholarship for two consecutive years. 

He has attended masterclasses at prestigious institutions including the Saline Royale Academy, Blackmore Academy, Accademia Stauffer, Verão Clássico Academy, and Accademia di Musica di Pinerolo with internationally renowned teachers such as Wolfgang Emanuel Schmidt, David Geringas, Gary Hoffman, Marc Coppey, Enrico Dindo, Sol Gabetta, Enrico Bronzi, Giovanni Gnocchi, Mario Brunello, Robert Cohen, Myklos Perenyi, Ludwig Quandt, Massimo Polidori, Bruno Canino, Enrico Pace, and Claus-Christian Schuster.

Daphne Richman Poleg (2003) an Israeli cellist based in Tel Aviv. A graduate of Thelma Yellin School of art, The Israeli Conservatory of Music in Tel Aviv, The Jerusalem Music Centre which included, The excellence program "Huberman", the "Goldman" chamber program and the Young Israeli philharmonic orchestra. She holds a Bachelor’s degree in Music Performance from the Buchmann-Mehta School of Music, Tel Aviv University, where she studied with Prof. Hillel Zori.

Winner of the Golden Baton Soloist Competition and played in concerts the Saint-Saëns Cello Concerto No. 1 with the Israel Sinfonietta Be'er Sheva (2025), First Prize at the Paul Ben-Haim Competition (2020), First Prize at the Israel Conservatory of Music Competition (2015, 2019), and winner of the Buchmann-Mehta School of Music String Competition (2024). In 2023, she was selected by audition to perform as a soloist in a project led by Kati Debretzeni. A scholarship recipient of the America-Israel Cultural Foundation (AICF), with special distinction (2019–2026). Receiver of certificate for outstanding achievement - the BMSM symphony (2024)

Performs regularly as a soloist and chamber musician in live broadcasts on “Kol HaMusica.” As a chamber musician, she is a Part of the Chamber Series in the Tel Aviv Museum of Art. She played with artists such as Sergey Ostrovsky, Noémie Bialobroda, Boris Brovtsyn, Chen Halevi and Hillel Zori.

Daphne has served as Principal Cello of the Buchmann-Mehta Symphony Orchestra (2022–2025), the Young Israeli Philharmonic Orchestra (2019–2021), and the Thelma Yellin Symphony Orchestra (2019-2022) under the baton of conductors such as Lahav Shani, Zubin Mehta and Karl-Heinz Steffens. She has also taken part in projects with the Israeli Philharmonic Orchestra.

She participated in the "Geneva International String Academy" (2024), Keshet Eilon Summer Mastercourse (2023–2024), and the AIMS Festival (2015–2022).

She participated in masterclasses with Prof. Peter Bruns, Prof. Danjulo Ishizaka, Prof. Leonid Gorokhov, prof. Claudio Bohórquez, Prof. Gary Hoffman, Prof. Frans Helmerson, Prof Hans Jürgen Jensen, Prof. Jens Peter Maintz and Prof Yitzhak Perlman.