Elaborate on the concept of extended techniques on traditional instruments and explain their contribution to sonic expansion.

Extended techniques on traditional instruments refer to unconventional methods of playing that go beyond the standard, historically established ways of producing sound. These techniques explore the full sonic potential of an instrument, pushing it beyond its intended limits and creating a wider range of timbres, textures, and sound events. This approach is often used in contemporary and experimental music, offering composers and performers a vast palette of new sounds and expressive possibilities. Rather than being seen as a limitation, instruments are seen as a starting point for exploring unconventional musical sounds. Traditionally, instruments were played using methods designed to produce clear pitches and tones within the framework of conventional music. Extended techniques, however, often prioritize timbre, noise, and unconventional articulations over pitch and melody. This can involve a variety of manipulations and alterations, ranging from altering the way the instrument is held or manipulated, to preparing the instrument with various objects that interfere with the production of sound. For example, on string instruments like the violin or cello, extended techniques include bowing near the bridge or fingerboard to produce high-pitched squeals, using the bow to strike the strings percussively, or plucking the strings with various objects like drumsticks or plectrums. These actions create timbres very distinct from traditional bowed or plucked sounds. Composers such as Iannis....