Sitar strings create hypnotic drones in Indian music

The sitar, an iconic Indian instrument, uses hidden 'sympathetic' strings to produce a continuous, humming drone. These 11-13 strings lie beneath the main ones, tuned to the raga's notes. When the musician plays, these sympathetic strings subtly vibrate, creating a harmonic foundation. This drone isn't just background noise; it anchors the music, allowing melodic improvisations to flourish without Western-style chord progressions. This technique, refined in the 18th century, helps create the meditative, cyclical sound central to Indian classical traditions, fostering a timeless immersion for listeners.