Indian music can be described as having been inaugurated with the chanting of Vedic hymns, though it is more than probable that the Indus Valley Civilization was not without its musical culture, of which almost nothing is known. There are references to various string and wind instruments, as well as several kinds of drums and cymbals, in the Vedas. Sometime between the 2nd century BC and the 5th century AD, the Natyashastra, on Treatise on the Dramatic Arts, was composed by Bharata.