Born in Naples (Italy), Ettore CAUSA started his studies of violin and viola at the Naples Conservatory, and after graduating with the highest marks he was selected to study at the International Menuhin Music Academy (Switzerland) where he stayed for four years. He was taught by Sir Yehudi MENUHIN, Alberto LYSY and Johannes ESKAR, who were to become important inspirational guides in his development. In 1996 he won a scholarship to work under the guidance of Michael TREE (Guarneri Quartet) at the Manhattan School of Music (New York). Upon completing his studies in 1998, Ettore CAUSA was appointed First Solo Viola of the Odense Symphony Orchestra (Denmark).In 2000, he was awarded both the “P. Schidlof prize” and the “J. Barbirolli prize” for 'the most beautiful sound' in the prestigious Lionel Tertis International Viola competition (England).

He has since made soloist and recital appearances with leading musicians in many of the major venues around the world, and performed as a soloist in some of the most important halls - Victoria Hall, (Geneva), Zurich Tonhalle, Madrid National Auditorium, Barcelona Auditorium, Salle Cortot (Paris), Teatro Colon (Buenos Aires), Tokyo and Osaka Symphony Hall, MSM Auditorium (New York); and played at the major Festivals - The Menuhin Festival (Gstaad), Festival de Estoril (Portugal), Salzburg Festival, Festival del Pontino (Italy), Tivoli Festival (Copenhagen) and Festival of Perth (Australia). Particularly devoted to chamber music, he is also regularly invited to prestigious chamber music festivals like Prussia Cove (England), Savonlinna (Finland), Lanaudiere (Canada) and the Festival Lysy (Buenos Aires).

Since 2004 is member of the Aria Quartet - a leading ensemble on the Swiss chamber music scene, and with whom he performs regularly in Switzerland and abroad. He is currently professor of both Viola and Chamber Music at the International Menuhin Music Academy in Switzerland and he is regularly invited to give Master Classes not only in Switzerland, but also in Spain, Portugal, Italy and Argentina.

Born in Paris in 1954, he has entered the Conservatoire National Supérieur de Musique de Paris at the age of ten. He still remembers his Master René BENEDETTI as a natural and bright phrasing and virtuosity without defect. In the 1970s, rejecting the competitive spirit of the classical music environment, he left to discover the traditional Celtic violin in Scotland and set up on the Shetland islands to study, before travelling through the USA. From this period he kept the love of the unprompted music, essentially based on the emotion bring by the presence of the public.After a First Alto award at the Conservatoire de Paris, in Colette LEQUIEN’s class, he will bring closer his two experiences, naturally orienting his style to Musique de Chambre and Musique Baroque.

Under the direction of Jean HUBEAU begin then an experience which will conduct him to record beside the most famous European artists such as Ely AMELING, Gérard CAUSSE, Marielle NORDMANN and Jean HUBEAU himself. He also meets Hatto BEYERLE during an international contest and they become friends, this is how he will not cease improving his talent in the musical Art de la Rhétorique. Few years within the Quatuor Via Nova enabled him to travel over the five continents and also to improve his wonderful directory of strings.

Nowadays Pierre FRANCK plays beside Christophe COIN, within the Ensemble Baroque de Limoges and he is also teaching the alto and the Musique de Chambre at the Conservatoire de Boulogne Billancourt.

Born in in 1954, he has entered the Conservatoire National Supérieur de Musique de Paris   at the age of ten. He still remembers his Master René BENEDETTI as a natural and bright phrasing and virtuosity without defect. In the 1970s, rejecting the competitive spirit of the classical music environment, he left to discover the traditional Celtic violin in Scotland and set up on the Shetland islands to study, before travelling through the USA. From this period he kept the love of the unprompted music, essentially based on the emotion bring by the presence of the public.After a First Alto award at the Conservatoire de Paris, in Colette LEQUIEN’s class, he will bring closer his two experiences, naturally orienting his style to Musique de Chambre and Musique Baroque.

Under the direction of Jean HUBEAU begin then an experience which will conduct him to record beside the most famous European artists such as Ely AMELING, Gérard CAUSSE, Marielle NORDMANN and Jean HUBEAU himself. He also meets Hatto BEYERLE during an international contest and they become friends, this is how he will not cease improving his talent in the musical Art de la Rhétorique. Few years within the Quatuor Via Nova enabled him to travel over the five continents and also to improve his wonderful directory of strings.

Nowadays Pierre FRANCK plays beside Christophe COIN, within the Ensemble Baroque de Limoges and he is also teaching the alto and the Musique de Chambre at the Conservatory of Boulogne Billancourt.

Rainer MOOG, born in Cologne (Germany) received his musical education in Cologne Music Academy, Detmold Music Academy and at the Juilliard School, New York. In 1971 he won second prize at the ARD-Competition of Munich. From 1974 until 1978, he has principal violist with the "Berliner Philharmoniker" under H.V. KAJARAN.

He held professorships in Detmold, Berlin, The Hague, Bloomington and Köln since 1978. Frequent performances with the "Amadeus-Quartet" and a member of the "Philharmonic Oktett Berlin", "Berliner Solisten", "Van-Hoven-Quartet, Glinka Quartet and Vegh Quartet". He has been a juror at international Competitions in Geneva, Munich and Sendaï.

Rainer MOOG has been invited to many major festivals worlwide as a performer and teacher, such as: Marlboro (U.S.A.), Kuhmo (Finland), Prussia Cove (England),  Sidney, Canberra, Townsville (Australia), Sion (Switzerland), Brazil, Italy, France, Tenerifa, Taïwan, Japan, Korea. Among the several pieces he has premiered were B.BRITTENS "Lachrimae" for Solo-Viola and String-Orchestra ant the Viola-Concerto "Holocaust-Requiem" by Boris PIGOWAT withe the Symphony Orchestra of the Ukrainian National Philharmonic Society in Kiev (2001).

Actually, Rainer MOOG is the Artistic Director of the "International Music-Festival and Master Classes, Porto Carras" (Greece) and, since march 2007, he is holding a professorship at Yonsei University in Seoul (Korea).

After a first prize from the Conservatoire de Musique in Avignon, Pierre-Henri XUEREB obtained First Prize at the Paris Conservatory in viola class of Serge COLLOT at the age of sixteen. He perfected his training in the United States, first at Juilliard School, then at Boston University where he obtained the University’s Performance Award and a Bachelor of Music cum laude. Having studied with William PRIMEROSE, of whom he was one of the last pupils, he was a finalist of the Ernest Bloch Competition at the Juilliard School and Hindemith Competition of both Juilliard and the Aspen Festival.

After having auditioned for Pierre BOULEZ in New York, he joined the Ensemble Inter Contemporain as a soloist for two years. As a soloist and chamber musician, he collaborated with many prestigious ensembles – The Audubon, Parisii, Enesco, The Tchaikovsky Trio; and orchestras -The Ensemble Inter Contemporain, Orchestre régional Provence Côtes d’Azur, Orchestre lyrique Alpes Provence, Israel Sinfonietta. He has regularly been invited to play in various chamber music festivals and has appeared with musicians such as Pascal DEVOYON, Natalia GUTMAN, Jean-François HEISSER, Eugène ISTOMIN, among others.

Pierre-Henri XUEREB is professor of viola at the Paris Conservatory and at the Ecole Nationale de Musique in Gennevilliers. He regularly performs and teaches at international summer academies and festivals – Ecole Britten of Perigueux, Festival Pablo Casals of Prades, Musica Senza Frontiera (Bologne), Festival of Kuhmo, C.I.F.M. of Nice and Festival of Rambouillet. From 1991 to 1998, artistic director of the “Florence Gould Hall Chamber Players”, he organised a concert series at the Florence Gould Hall in New York.