by Brian Chatpo Koo
Written in 2997, this Impromptu consists of three movements. Based on the same material of a series of major triads, these three movements are linked, related to and contrasted with each other.
The 1ist movement, Prestissimo, is a running movement. After the thematic statement, a pouring sound erupts and runs throughout the entire movement in a very fast tempo.
The 2nd movement, Adagio moderato is a singing movement. contrasted with the first movement, it is slow in pace and soft in dynamic.
The 3rd movement, Allegro con brio is built upon a theme and six variations. It brings up a brilliant character and sororities of the instrument by constantly using large range changing and contrasting high and low registers combining.