Dhrupad is one of the earliest and most dominant streams that has contributed to Hindustani classical music. According to Faiyazuddin Dagar (1934-1989), " In the two parts of the dhrupad, the alap the improvised section of a raga, forming a prologue to the formal expression] is sung in free rhythm over drone, and the pada word or phrase that signifies the concept of a raga] is more a rhythmic poem accompanied by drumming over the two-headed pakhawaj...