Afghan classical music has close historical links with Indian classical music and use the same Hindustani terminology and theories like raga. Genres of this style of music include ghazal (poetic music) and instruments such as the Indian tabla, sitar and harmonium, and local instruments like zerbaghali, as well as dayereh and tanbur which are also known in Central Asia, the Caucusus and the Middle East. The rubab is the country's national instrument and precurses the Indian sarod instrument. Some of the famous artists of classical music include Ustad Sarahang and Sarban.