As one - G. Scelsi's the only pitch method but colourful

The heterophonic texture in Chinese music, with all instruments playing the same melody, have a great effect of combining the timbre of an individual instrument. Since each instrument has its own pattern of harmonic series. In the case of Chinese folk instruments, each instrument sounds quite special and unique. Chinese characterize the instruments into 8 categories: metal, stone, string, bamboo, gourd, clay, leather, wood. When different instruments are combined within the same melody, 

This kind of oneness was further expanded to one note. In his Quattro pezzi su una nota sola ("Four Pieces on a single note", 1959) his best-known technique for having composed music based around only one pitch, altered in all manners through microtonal oscillations, harmonic allusions, and changes in timbre and dynamics. With different instruments add-in or drop-out, the timbre is constantly changing even though there is only one note. Similar to heterophony in Chinese music, instruments playing the same melody with ornamentation or simplification, the melody and timbre combined are constantly changing.


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