A shruti box is a small wooden instrument that traditionally works on a system of bellows. It is similar to a harmonium and is used to provide a drone in a practice session or concert of Indian classical music. It is used as an accompaniment to other instruments and notably the flute. Use of the shruti box has widened with the cross-cultural influences of world music and new age music to provide a drone for many other instruments as well as vocalists.
Shruti is like the soul of the Indian Music. It is said “Shruthirmaatha”- Shruti is the divine mother of music. The shruti is the basis of the music-the base of all notes. Shruti is the divine source from where the music is born and flows melodiously. Shruti is just like the mother who gives birth to her offspring and guides him/her throughout the life without going off the track. Shruti guides the singer throughout the concert without losing track.