The creative and developmental research aimed to study on the innovation of harmonic soundscape of the tonal theory in order to implement the new approach of method using ‘Rajabhat Rajapakdi’ theme as the experimental model. The newly applied harmony, instrumental arrangement, and the sophisticated sound design technology were the key factors to enhance the musical value and aesthetic sense of appreciation. In addition, the perfectly well crafted versions of the music was presented as the concerts and the creative music documentary form such as CD, DVD. Meanwhile, the music was implemented by the innovated and splendid technique, stylistic interpretation, as well as the kaleidoscope of imaginative soundscape. The advance technology showed it’s highly efficiency performance in minimizing of man power and financial economy. The rich sound resonance of the ‘Rajabhat Rajapakdi’ tune was arranged to accommodate small numbers of musical instruments, musicians and singers whereby it still maintained, quality of the orchestra. Musical technology and synthetic sound was used to enhancing sound quality. The newly written version of ‘Rajabhat Rajapakdi’ for Synthetic Chorus was also based upon current technology using in movie industry and its economical way to create music production with the orchestral score but wide range of resources. The concepts of composing Western classical, Jazz, and Thai music are based on the fundamental of tonal theory. The synthetic chorus was performed by 4 choral singers accompanied by saxophone and piano, by the time that the synchronizing of sounds were integrated the chorus and instrumentalist to empower the synthetic orchestral dimension.