The ghatam is a percussion instrument of South India – an earthenware pot that is played using the fingers, thumbs, palms and heels of the hand to strike the outer surface of the ghatam. It has a huge variety of sounds. An airy low-pitch bass sound, called gumki, is created by hitting the mouth of the pot with an open hand. Musicians sometimes press the mouth of the pot against their bare stomachs which deepens the tone of the bass stroke and is another way to produce the 'gumki' sound. Different tones can be produced by hitting different areas of the pot with different parts of the hands. In Indian classical music, the ghatam usually accompanies the mridanga.