To produce a new rabāba, a tumbura devotee will take two picket bowls (of suitable form and product), applies incense to them, and sacrifices pigeons. The bowls would be buried for forty times, and friends would come and sleep on the bottom around where by they had been buried. https://zarmusic24689.shotblogs.com/new-step-by-step-map-for-zar-music-44797491