Sunmi Chang began her study of the violin at the age of seven with Professor Nam-Yun Kim in her native South Korea, where she won several national competitions before going to England to study at the Yehudi Menuhin School (YMS) in 1995. While at the YMS, she performed regularly in concert halls including Wigmore Hall, Queen Elizabeth Hall, Royal Albert Hall and the Purcell Room, as well as at the UNESCO Headquarters in Paris.
Sunmi continued her studies at the Hanns Eisler Musikhochschule in Berlin with Professor Eberhard Feltz. In 2006 she won the Woolsey Hall Concerto Competition at the Yale School of Music, and has performed the Bartók Violin Concerto No. 2 with the Philharmonia Orchestra of Yale. In the summer of 2008, as part of the cultural prelude to the Olympics, she performed the Beethoven Violin Concerto with the Yale Philharmonia in Asia. She earned her master of music and artist diploma degrees from Yale under Peter Oundjian and Ani Kavafian. Sunmi has performed with renowned artists such as Kim Kashkashian, Donald Weilerstein, Ani Kavafian, Marcy Rosen, and Edward Arron. She is the laureate of the 2007 International Markneukirchen Violin Competition in Germany and the 2007 International Sion Valais Violin Competition in Switzerland.