GAKA IV， Heterophony on Drone， for Violin and Cello（1988）

GAKA Ⅰ，Ⅱ，Ⅲ and Ⅳ are a series of works from 1986 to l988 when I was devoted to explore possibilities of heterophonic style in my music. Together with my other contemporary works such as Heterophony of Two Pianos and Orchestra (1987) and the final version of Heterophony for String Quartet (1988)， the four pieces can be seen as the starting point of my subsequent heterophonic compositions. In composing the four GAKAs， I applied four distinctive types of heterophonic style.
[GAKA IV]
Duo for violin and cello. The open D and A strings of both instruments make a constant drone of a perfect forth. I explored the possibilities of the heterophony derived from the fixed drone. In order to produce the heterophony I placed the wavy movement played with double stops that stems form and sways around the drone. In addition， I also created melodic lines with melismatic ornaments twisting around the drone and rippling texture by means of bowing. In the latter half of the work， there is also the heterophony that appears like flickering aurora in the high overtones generated by flageolet tones played on the open strings of drone.