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.

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 Paris in 2005, Clara Messina began playing the violin at the age of six. She studied successively with Rodica Bogdanas, Christophe Poiget and Agnès Reverdy at the regional conservatoires (CRR) of Boulogne-Billancourt and Paris, before entering the Conservatoire National Supérieur de Musique et de Danse de Paris at fifteen, in the class of Stéphanie-Marie Degand.

In 2022, she won second prize and the audience prize at the Cambrai International Violin Competition, followed by second prize at the Concours Jeunes Talents in Paris.

In 2023, she was the only French violinist selected for the semi-final of the Mirecourt International Competition, on which occasion she was entrusted with a violin by Andreas Guarnerius.

Selected for several international academies (Santander, Villecroze, Tibor Varga in Sion, Sincronia Musica in Rome), she obtained her Bachelor's degree in 2024 by unanimous decision of the jury, with its congratulations, and took part in the Caunes-Minervois festival, playing in duo with cellist Edgar Moreau.

Clara performed Nun komm by Thierry Escaich at the “Thierry Escaich and Friends” recital in January 2025, and in July once again takes part in the Santander academy, where she will have the opportunity to play in six chamber music concerts, including one with clarinettist Gabor Varga.

In January 2026, she took part in the Musikfest at the Philharmonie de Paris, playing alongside Liya Petrova, Alexandre Kantorow, Daniel Hope, Jean Rondeau and Lise Berthaud, among others.

Dániel Hodos was born in Hungary and studied at the School for Exceptional Young Talents of the Liszt Ferenc Academy of Music in Budapest. In 2021, he received a Kohl Scholarship to study at the Colburn Music Academy in Los Angeles, where he studied with Joan Kwuon. He is currently pursuing his bachelor’s degree in the studio of Prof. Tobias Feldmann at the University of Music and Theatre Leipzig.

Hodos is a winner of the 2023 Salon de Virtuosi Career Grant and was invited to perform at the Salon’s annual Gala Awards Concert at Merkin Hall in New York. His performances have been featured on The Violin Channel and on WQXR’s Young Artists Showcase. He is also a recipient of the 2023 Jack Kent Cooke Young Artist Scholarship, an honor awarded annually to 20 outstanding young musicians by NPR’s From the Top. This year, he was selected as a Student Artist for the 2025 Starling–DeLay Symposium on Violin Studies at The Juilliard School.

He is a prizewinner of several international competitions, including the Kloster Schöntal International Violin Competition, the Jenő Hubay International Violin Competition, and the Ilona Fehér International Violin Competition. He was also winner of the Colburn Academy Concerto Competition.

As a soloist, Hodos has appeared with leading orchestras such as the Budapest Philharmonic Orchestra, the Franz Liszt Chamber Orchestra, the MÁV Symphony Orchestra, the Anima Musicae Chamber Orchestra, and the Hungarian Virtuosi Chamber Orchestra. He has participated in masterclasses with Midori Goto, Catherine Cho, Philip Setzer, Tatjana Masurenko, Kirill Troussov, Shlomo Mintz, and Barnabás Kelemen.

Hodos has attended several prestigious summer programs, including the Aspen Music Festival and School in 2023, where he studied with Robert Lipsett as a Starling Fellow. In 2022, he attended the Meadowmount School of Music on a full scholarship, studying with Gerardo Ribeiro. In 2024, he was selected to participate in the Carl Flesch Academy in Baden-Baden.

Originally from Grenoble, Louise began her musical studies on the violin at her local conservatory, before continuing at the Conservatoire de Lyon and later at the Haute École de Musique de Genève, where she completed her Bachelor’s degree in 2024 in the class of Alexander Rozhdestvensky.

Alongside her violin studies, she took up the viola at the Conservatoire de Genève with Noémie Bialobroda. Her passion for the instrument soon led her to devote herself fully to it.

In addition to her instrumental practice, Louise is deeply interested in teaching and is currently pursuing a Master’s degree in pedagogy at the Haute École de Musique de Genève in the class of Máté Szücs.

Since taking up the viola, she has had the opportunity to work with musicians such as Andriy Viytovych, Gilad Karni, Françoise Gnéri and German Tcakulov, notably through masterclasses at the Keshet Eilon Academy and the Musique à Flaine festival.

Yiqun Huang (born 2002) began studying the violin at the age of eight. At fourteen, he was admitted to the Middle School affiliated with the Shanghai Conservatory of Music, where he studied with Ms. Shuting Wu. Since 2018, he has pursued viola studies under the guidance of Professor Nian Liu, violist of the Han Quartet and a member of the Imai Viola Quartet.

In 2021, he was admitted to the Bachelor’s program at the Shanghai Conservatory of Music as the top-ranked candidate in the national entrance examination. In 2025, he was accepted into the Conservatory’s Master’s program, ranking first in viola, and continues his studies with Professor Nian Liu.

As a soloist, he received the Grand Prize in the Strings Category C at the 2020 “City of Barletta” International Youth Competition (Italy), the First Prize in Category E at the 21st Valsesia International Music Competition (Italy), and the Second Prize at the 5th Moscow International Music Competition (Russia). During his undergraduate studies, he participated in several international competitions and was awarded the First Prize at the 2023 UK International Music Competition, subsequently becoming the Quarter II Grand Prize Winner.

In chamber music, his quartet won Second Prize at the 5th Moscow International Music Competition in 2021. In 2023, he joined the Vitality Trio and toured Serbia and Montenegro, where the ensemble was awarded Second Prize in the Chamber Music Category at the Bridge International Music Competition.

Amalia Bosch, born in Seville, is currently pursuing her Bachelor’s Degree at the Reina Sofía School of Music under the guidance of the professor Diemut Poppen.

She has been a member numerous chamber groups, currently performing with the Viardot Trio. Also member of the School’s Camerata, and Historical Performance ensembles.

She has received masterclasses from distinguished musicians including Joaquín Riquelm, Jonathan Brown Heime Müller, Gérard Caussé, Gregor Sigl, Tomoko Akasaka, Wenting Kan, Laure Gaurdon, and Carla Marrero. She has also participated in programmes such as the NHC Master Course, the Ribeira Sacra Festival, Barenboim Said Fundation and the Santander summer orchestra.

In 2024, she was awarded First Prize and Audience Prize at the Ribeira Sacra festival. 

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.