These musicians are associated to Masterclass Apeldoorn as masters. Some of them from the start, others since more recent years.

Colin Carr has appeared throughout the world as soloist, chamber musician and teacher. As a concerto soloist he has played with major orchestras worldwide. He is a frequent visitor to international chamber music festivals and has appeared often as a guest with the Guarneri and Emerson string quartet and the Chamber Music Society of Lincoln Center in New York.

Pascal Devoyon has given highly acclaimed recitals in New York's Carnegie Hall, Amsterdam's Concertgebouw, the Philharmonie in Berlin and the Queen Elisabeth Hall. His repertoire is extensive and varied; he performs the complete Beethoven sonata cycle, major 20th Century works, such as Bartok and Messiaen and works of contemporary composers. Since 1999, he is with Dong-Suk Kang artistic director of the festival "MusicAlp", France.

Philippe Graffin 'sever-questing mind led him to rediscover original settings of Chausson's Poème and Ravel's Tzigane. He brought back to life the forgotten violin concertos of Fauré, Saint-Saëns and Samuel Coleridge-Taylor. He is the artistic director of "Consonances", the chamber music festival of St. Nazaire, France and is invited regularly to appear at the major chamber music festivals across Europe and the US.

Gary Hoffman is one of the outstanding cellists of our time, combining instrumental mastery, great beauty of sound, and a poetic sensibility in his distinctive and memorable performances. Born in Vancouver, Canada, in 1956, Gary Hoffman devotes time to teaching, as well, having been the youngest faculty appointee in the history of the Indiana University School of Music, where he remained for eight years. Mr. Hoffman regularly holds master classes world-wide. Residing in Paris, he is an active recording artist. Gary Hoffman performs on a 1662 Nicolo Amati, the "ex- Leonard Rose".

Nobuko Imai is one of the greatest violists of her generation. She studied viola at the Toho School of Music in Japan, her home country, before continuing her studies at Yale and then at Juilliard in the USA. First prize winner in the Munich, Geneva and Suntory Music competitions, she was a member of the Vermeer Quartet for many years. She is also a highly sought-after teacher, teaching regularly at the Amsterdam and Geneva conservatoires and giving masterclasses.

Charles Neidich is one of the world's finest and most widely recorded clarinettists. In the US he has worked with many of the major orchestras and chamber music ensembles. His repertoire of well over 200 solo works includes pieces commissioned or inspired by him, as well as his own transcriptions and compositions. Charles Neidich is on the faculties of the Juilliard School.

Ásdís Valdimarsdóttir is now based in Amsterdam. She was a founding member of the Miami String Quartet, principal viola of the Deutsche Kammerphilharmonie Bremen, violist of the Chilingirian Quartet in London for a number of years and the later
the Utrecht String Quartet. She has been invited to many prestigious festivals around the world, such as the Marlboro and the Kuhmo festivals. She joined the faculty of the Royal Northern College of Music in Manchester in 2008 where she teaches viola and chamber music.

Raphael Wallfish  is one of the most celebrated cellists performing on the international stage. He was born in London into a family of distinguished musicians, his mother the cellist Anita Lasker-Wallfisch and his father the pianist Peter Wallfisch.
At an early age, Raphael was greatly inspired by hearing Zara Nelsova play, and, guided by a succession of fine teachers including Amaryllis Fleming, Amadeo Baldovino and Derek Simpson, it became apparent that the cello was to be his life's work. Teaching is one of Raphael's passions. He is in demand as a teacher all over the world holding the position of professor of cello in Switzerland at the Zürich Winterthur Konservatorium and at the Royal Northern College of Music in Manchester.