About Young Chang Research & Development Institute - Kurzweil Music Systems Kurzweil Music Systems was founded in 1982 by Ray Kurzweil, with inspiration from Stevie Wonder after having collaborated together on a reading machine for the blind. In 1983 the Kurzweil K250 keyboard was considered the first successful attempt to realistically emulate the sound of a grand piano. Since then, Kurzweil has been renowned for being a major innovator in the music technology industry and continues to redefine keyboard instrument. Young Chang R&D Institute is located in Waltham, Massachusetts. About Young Chang Young Chang was established in 1956 as the first piano brand in Korea's history. Young Chang has become synonymous for reliability and quality of the finest instruments. Each of our instruments has undergone hundreds of individual steps in order to produce the perfect artwork of the finished product. Each piano made has been produced with the heart and soul of Young Chang. Young Chang is an HDC company.