A harmonium, also called a "melodeon", "reed organ" or "pump organ", is a keyboard instrument that is a lot like an organ. It makes sound by blowing air through reeds, which are tuned to different pitches to make musical notes. The hand pumped harmonium was created by Dwarkanath Ghose so that the instrument could be played while the player was sitting down on the floor.It is used as an accompanying instrument in Hindusthani classical music, Sufi music, Bhajan, and other devotional music, Qawwali, Natya Sangeet, and a veriety of genres including accompaniment to Classical Kathak Dance. 22-Shruti-Harmonium was created by Vidyadhar Oke. To achieve this, he first clarified the essential difference between 'Nada' and 'Shruti' and pinpointed the positions to play the 22 Microtones (Shrutis) on any string instrument.