A santur uses several strings tuned to the same notes to create greater volume, sustain, tonal richness, and natural resonance. These grouped strings respond together when struck, giving the instrument its distinctive shimmering character while helping its low, middle, and high registers remain balanced.

Tonbank players create an impressive range of sounds by combining precise hand positions, finger techniques, rhythmic control, and changes in tone. Although the tonbak has a single drumhead, its shape and responsive construction allow musicians to produce deep bass notes, sharp accents, rolls, snaps, and subtle textures from one instrument.

The metal rings inside a daf are not decorative additions. They create a responsive layer of sound that moves with the drum, producing shimmering rolls, sharp accents, sustained textures, and rhythmic effects that the membrane cannot generate by itself. Their weight, arrangement, and movement also influence playing technique, making them an essential part of the instrument’s character.

The kamancheh produces its haunting, voice-like sound through a distinctive combination of bowed strings, a skin-covered resonating chamber, a fretless neck, flexible bow tension, and highly expressive playing techniques. These features allow musicians to shape notes with fluid slides, subtle pitch changes, controlled vibrato, and tonal variations that closely resemble the movement and emotion of the human voice.

The setar takes its name from the Persian words “se,” meaning three, and “tar,” meaning string. Although the modern instrument has four strings, it was originally built with three. A fourth string was added centuries later and became a lasting part of its construction, while the traditional name remained unchanged.