A key part of the Festival is our Apprenticeship Program, a summer residential program for students and young professionals. It is an intensive exploration of chamber music from the Classical and Romantic era on period instruments through both coachings from and collaborations with some of the world’s leading experts in early music, with an emphasis on performance.

We are delighted to present these future masters:

  • Keats Dieffenbach, violin
  • Jason Issokson, violin
  • Joshua Gomberoff, viola
  • Geirþrúður Guðmundsdóttir, cello
  • David Belkovski, fortepiano


Equally comfortable on the stages of Carnegie Hall and the set of Saturday Night Live, Keats Dieffenbach has established herself as a unique artist with infinitely varied interests and abilities. Lauded by the New York Times as an "impressive performer," Keats' dual specialization in contemporary and historical performance on multiple instruments keeps her in demand with many leading ensembles. Keats is a member of Orchestra of St. Luke’s, Mark Morris Dance Group Music Ensemble, Juilliard415, and The Serenade Quartet, and she has appeared frequently with The Knights, A Far Cry chamber orchestra, and Carnegie Hall's Ensemble Connect with whom she held a prestigious two-year fellowship position. An avid chamber musician, Keats' collaborators have ranged from Emanuel Ax and Christian Tetzlaff to indie rock sensation Vampire Weekend. She has served as concertmaster under many leading conductors and has worked closely with composers Steve Reich, Shulamit Ran, Nico Muhly, and others. Keats studied modern violin with Robert Mann at The Juilliard School and served as Donald Weilerstein’s teaching assistant at New England Conservatory. She recently graduated from Juilliard’s Historical Performance program as a baroque violin student of Cynthia Roberts and Elizabeth Blumenstock.


Violinist Jason Issokson enjoys an active career as a soloist and chamber musician. Concerto highlights include engagements with the Fort Worth Symphony, Aspen Concert Orchestra, Sendai Philharmonic Orchestra, the Orchestra di Teatro San Carlo, and the Orchestra Internazionale d'Italia. Recent chamber music appearances include debuts at Carnegie Hall, Merkin Hall, and Alice Tully Hall. As a founding member of the Argus Quartet, Jason has been awarded first prize at the M-Prize Competition, and first prize at the Concert Artists Guild Competition. Jason’s solo playing has garnered numerous awards including prizes at the International Violin Competition ‘Andrea Postacchini,’ the ‘Alberto Curci’ International Violin Competition, and the ‘Max Rostal’ International Competition.


Since being able to hold an instrument at the age of 3, Josh's musical training has been wildly diverse – ranging from fiddle, rock n' roll, and improvisation, to traditional classical, contemporary, and historically informed performance practice. Josh completed his BMus at the University of Victoria where he studied classical viola privately with Joanna Hood, and thrived in chamber music with guidance from the Lafayette String Quartet. Josh then completed his MMus at the Manhattan School of Music, where he had the privilege of studying with Karen Ritscher. He will be continuing his studies next year at the Manhattan School of Music completing their Professions Studies Certificate.

Geirþrúður Guðmundsdóttir

Geirþrúður Anna Guðmundsdóttir was born and raised in Reykjavík and is quickly establishing herself as one of Iceland’s most promising young musicians. In 2013, she made her debut with the Iceland Symphony Orchestra and has since played numerous recitals both in Europe and the U.S. She holds degrees from the Reykjavík College of Music and Northwestern University and is currently pursuing a master’s degree at The Juilliard School where she studies with Prof. Natasha Brofsky and has taken secondary baroque cello lessons from Phoebe Carrai. Aside from music, Geirþrúður also enjoys running, cooking, and playing chess!


Born in Skopje, Macedonia, David Belkovski's journey as a musician has taken him from early ventures into Balkan folk music and jazz, to the vibrant beginnings of a career as harpsichordist, fortepianist, and modern pianist.  Winner of the 2019 Sfzp International Fortepiano Competition, David continues to be recognized for his artistry on a variety of historic keyboards. David makes his Lincoln Center debut with the American Classical Orchestra in the fall, performing Mozart's A Major concerto.

As a harpsichordist and continuo player, David has played alongside William Christie in an acclaimed performance of Handel’s Aminta e Fillide. David will be touring Europe this summer with Juilliard415 and Vocal Arts as harpsichordist for Purcell’s Dido and Aeneas. David currently studies historical keyboards at The Juilliard School under the guidance of Richard Egarr and Béatrice Martin.




Jessica Park, violin

Isabelle Seula Lee, violin

Toma Iliev, violin and viola

Eugenio Solinas, cello

Ji Young Kim, fortepiano

Mike Lee, fortepiano


Rachell Wong, violin

Maria Romero, violin

Andrew Gonzalez, viola

Ana Kim, cello

Jennifer Lee, piano


Susannah Foster, violin

Sarah Bleile, violin

Lauren Nelson, viola

Madeleine Bouïssou, cello

Christian De Luca, fortepiano


Tuition is $700 for the 2016 summer program. Some financial assistance in the form of work-study opportunities (librarian and festival driving) is available. If you are requesting financial aid, include a statement of need in your application.


The application includes your biography (1-2 paragraphs), your statement of interest in period instruments and historic performance, and a recording of your playing. We would like a link to your music online, or email us an mp3 file of a roughly 10-minute recording of you playing 2 pieces of Classical and/or Romantic chamber music on period or modern instruments. Two contrasting selections are encouraged. Selections should be chosen so that we can clearly hear the qualities of your own playing as well as how you collaborate with your colleagues.

All materials must be received by February 28, 2016. Apprentices will be notified of their acceptance, as well as their assigned repertoire, by March 15th, 2016. Please submit any questions to

Submit your application below. Include your name and instrument in any attachments. There is an application fee of $25, payable online via PayPal. We cannot consider you for admission without receiving the application fee.


Full Name:




How did you hear about the Program?

Links to your 2 performance samples (YouTube, Dropbox, Google folder, etc.) If this is not available, please send a separate email with your recordings as attachments to with the subject "Name, instrument":