The ottu (or otter[1]) is a double reed wind instrument, used in Carnatic music of Southern India to provide a drone accompaniment to the similar nadaswaram oboe.
This traditional Indian wind instrument shares similarities with the nadaswaram in terms of size and shape, contributing to its powerful and resonant sound.
The ottu plays a crucial role in South Indian classical music, often accompanying the nadaswaram in temple rituals and ceremonial occasions.
The tuning holes and the use of wax offer a simple yet effective method for achieving the desired pitch, making the ottu an essential instrument in South Indian classical music for maintaining harmonic balance.
The steadiness of the shruti box makes it a preferred option in various musical settings, ensuring a continuous harmonic foundation that supports the main performance.