Module 8: Instruments · Lesson 1

The voice and the drone

● Confidence: high Last verified: 12 Oct 2026

The voice comes first

Carnatic music is built around singing. A research project at Universitat Pompeu Fabra notes that Indian instruments were largely developed to imitate the expressive qualities of trained singers, and instruments, even when they play solo, follow the style of the voice (often called the Gayaki style). So the first “instrument” to know is the human voice, which carries both the notes and the words.

The drone: tambura

Behind the voice sounds the Drone , most often produced by the Tambura . It is a long-necked plucked instrument with four strings, played by gently plucking the open strings one after another, again and again, so that the sound is continuous. It does not play a tune. It sounds the tonic (Sa) and the note a fifth above (Pa), so the ear always has a reference to compare the melody to. Usually one string is tuned to Pa, two to Sa and one to the lower Sa; for a raga without Pa the Pa string is sometimes tuned to another note, such as Ma.

The tambura is usually tuned to Sa at whatever pitch the performer has chosen (the Adhara Shadja ). Its bright, buzzing tone comes from the bridge, where thin threads under the strings help them resonate without touching the metal.

Electronic alternatives

A Shruti box or an electronic tanpura can supply the drone, and the tambura is increasingly replaced by them.

Why a drone?

Carnatic music is melody-based, without chords. A single melodic line needs a fixed point to be heard against. The drone supplies it, and the character of each note in a raga depends on its relationship to the tonic. The NIOS Carnatic music textbook adds that the drone sounds from the beginning to the end of a concert and keeps instruments such as the flute, whose pitch cannot be adjusted, from drifting.

Summary