Gaval (daf) is an Azerbaijani folk percussion musical instrument. It is one of the few musical instruments that are still preserved in its original form.
The gaval has a circular wooden frame with the skin of a sturgeon stretched over it. Sometimes, 60-70 copper or metal rings are mounted to the frame, which create a jingling sound, when the instrument is played. The player holds the gaval with both hands and plays it with fingertips, sometimes slapping it. The gaval is a vital instrument for the interpretation of the traditional Azerbaijani music genres, such as tasnif and mugham.