text: SUTULI: Aerophone
  ASSAM
  It is a hollow semi-lunar earthen wind instrument. The instrument is swollen of the middle gradually tapering towards both ends; bears a mouth hole at the middle and two finger holes, towards either end. It is played, holding the instrument by one or both the hands and the player holds his lip so that this stream of air is directed against the lower edge of the mouth hole to produce a whistling sound. By opening and closing the finger holes, the player can produce highly melodious sound just like a a flute. It is played as one of the assisting instruments in bihu dance. 
  