Answer :
In some asian cultures and in some European folk music, harmony consists of a single sustained pitch that is called a drone.
What was the significance of the drone in Asian and European folk music?
A drone is a harmonic and sustained tone that provides a deep foundation for a melody or melodies sounding at a higher pitch level. It is generally described and characterized as a lengthy audio programs with slight harmonic variations.
In Asian and European music, the use of drone is very common because it is a defining part of music. The drone sets a constant feeling for the piece in the music that provides a melodious structure and balance to it.
Basically, the drone helps to push the melody forward and maintains a sense of dramatic tension in the music.
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