Leonelys Sánchez was born in Venezuela in 1994. She started play the violin when she was 9 in Coro (Venezuela) with her teachers Mileyde Valera, Francisco Diaz and Sergio Celis.

Her orchestral career began with the Sistema de Orquestas de Venezuela. In 2007, she was a member of the National Children`s Orchestra of Venezuela conducted by Maestro Gustavo Dudamel.

Following this, she was first violin in the Teresa Carreño Youth Orchestra of Venezuela and made international tours to Germany, China, France, Japan, Sweden and other countries.

Leonelys lives in México City since 2017 and in her last year of “Performance of Violin” with her Professor Natalia Gvozdetskaya Ovchinnikova. She currently is a member of the Eduardo Mata Youth orchestra.

Estelle Weber is a 19-year old violinist from Germany who expresses her passion both through solo and chamber music.

She received her first violin lessons at the age of 5. Since she was 8, she received 1st Prizes in numerous of national and international competitions including the National Youth Competition "Jugend Musiziert“, Szymon Goldberg, Carl-Schröder, Karl-Adler and the "Violin and Friends“ competition in Malta.

Estelle was a member of the Paganino Quartett and they won the WDR- Klassikpeis in 2017 which resulted in invitations for radio recordings.

Her mentors include Pavel Vernikov, Kirill Troussov, Heime Müller, Petru Munteanu and Christian Sikorski and she has also studied at the Kronberg Academy twice where she played with and learned from musicians such as Bruno Philippe, Gerhald Schulz, Ana Chumachenco, Mauricio Fuks and Mihaela Martin. 

As a part of the LGT Young Soloists, she has played in Munich, Singapore, Hong Kong and in the Musikverein in Vienna. Other performances were given in Berlin, Frankfurt, Hamburg, Dresden, Halle, Paris and in Bucharest. 

Estelle is currently pursuing her Bachelor of Arts Degree in violin performance at the Mozarteum University Salzburg with Professor Annelie Gahl.

Leon Keuffer, born in Belém do Pará, received his first violin lessons from his father Paulo Keuffer, violin teacher at the music school of the State University of Pará (EMUFPA). 

In 2009, at the age of 14, Leon moved to Manchester (UK) to study at the prestigious Chetham's School of Music (the first Brazilian to be accepted into this institution) in the class of Professor Jan Repko. In 2012, Leon won the Concerto Competition at Chetham’s and had the opportunity to perform as a soloist with the Chetham’s Symphony Orchestra.

In 2013, Leon received a full scholarship for a Bachelor's degree at the Royal College of Music in London in the class of Professor Jan Repko. In 2015 Leon was a semi-finalist at the Ginette Neveu International Violin Competition in Avignon, France. In February and May 2016 Leon performed together with the pianist Andrew Yiangou in the churches of St. Mary's Perivale and St. Barnabas in London.

In April 2016, Leon was a semi-finalist in the Tunbridge Wells International Competition for Young Artists and received the "Best Performance of Virtuoso Pieces" award for his performance of works by Henryk Wieniawski and Pablo de Sarasate by renowned jurors such as cellist Raphael Wallfisch and the violinist Philippe Graffin. In June 2016, Leon, having been selected by the Royal College of Music, gave a violin and piano concert with pianist Brooks Aehron on one of the world's most advanced cruises, Royal Caribbean International's "Ovation of the Seas", and again in April 2017. On July 4th, Leon performed with the contemporary music group New Perspectives at a concert in partnership with the London Philharmonic Orchestra, at which works by popular composers such as Magnus Lindberg, Julian Anderson and Oliver Knussen were performed in the presence of Magnus Lindberg and Julian Anderson.

In the 2015/2016 season, Leon worked with renowned artists such as the composer Steve Reich, Hakan Hardenberger, the keyboardist Rick Wakeman, the conductor and clarinetist Timothy Lines, the conductor Juraj Valcuha, Diego Masson and Bernard Haitink. In July 2017, Leon was recorded with the renowned contemporary London Sinfonietta music group. He also attended the London Sinfonietta Academy, worked with conductor Andrew Gourlay, and had the opportunity to meet well-known composers such as Tansy Davies and Rolf Wallin. Leon graduated in July 2017 with first-class honours.

Leon has been a master student at the Mozarteum University in Salzburg since October 2018 in the class of Professor Lavard Skou-Larsen. As a Masters student, he has taken part in masterclasses with some of the most famous violinists of this generation, including Vadim Repin and Maxim Vengerov. Leon is a member of the Salzburg Philharmonic.

Leon plays an instrument made by the Austrian violin maker Wiltrud Fauler, kindly made available by the Mozarteum University Salzburg.