The Na’vi categorize their social songs into two groups that are analogous to terrestrial dance tunes and banquet songs. The dance tunes are lively, upbeat, and extremely rhythmic. They are sung in unison, either while dancing or observing the dance. They are accompanied by drums. The category of banquet songs comprises three distinct types of songs: origin songs, historical epics of the Na’vi, and praise songs. These are the most musically complex songs; women sing a heterophonic melody while men maintain a drone that the Na’vi believe represents the spirit of Eywa.