The tambura is a fretless plucked lute responsible for maintaining the drone in Hindustani classical music.
The tanpura, tambura, or tanpuri is a long-necked, plucked string instrument of an Indian provenance that can be heard in various versions in Indian music. It doesn't play melody; instead, it provides a constant harmonic bourdon or drone to support and maintain the melody of another instrument or voice. A tanpura is not played in time with the soloist or the percussionist; rather, it is played continuously during the entire performance because the exact timing of plucking a cycle of four strings in a continuous loop determines the sound that is produced. All strings are pulled in succession to produce the acoustic background from which the raga's melody is derived.
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