Nagaland is inhabited by 16 major tribes along with other sub-tribes. Each tribe is distinct in character in terms of customs, language and dress. It is a land of folklore passed down the generations through word of mouth. Here, music is an integral part of life. Folk music The oral tradition is kept alive from the media of folk tales and songs. Naga folk songs are both romantic and historical, with songs narrating entire stories of famous ancestors and incidents. There are also seasonal songs which describe various activities done in a particular agricultural season. The themes of the folk music and songs are many; songs eulogizing ancestors, the brave deeds of warriors and traditional heroes; and poetic love songs immortalizing ancient tragic love stories. Indigenous instruments There are several rhythmic instruments that aptly accompany the Nagaland music. The area's folk music is dominated by string instruments like the Tati (single string fiddle) and Theku among the Chakhesangs and Angami Nagas, Asem (drum with animal skin masked upon carved wood) and Jemji (Horn made using mithun horn). Indigenous musical instruments extensively used by the people are bamboo mouth organs, cup violins, bamboo flutes, trumpets, drums made of cattle skin, and log drums. Each tribe has unique traditional instruments influenced by their customs and materials available. Modern music Two distinct genres of music exist in Nagaland: the choral/church/Christian type commonly known as gospel music and the rock/pop genre commonly known as secular music. Both types have their own distinct platforms, but their audience is by and large the same. In Nagaland, the platform for choral music is created by the church during conferences and crusades (special numbers, praise and worship etc.). Exclusive gospel concerts are also initiated by local churches, theological institutions or concerned individuals. Naga Choirs travel not only to places outside the state but also to foreign countries in order to perform for various world audiences. Many Naga musicians adopt traditional and folk tunes to lend a distinctive individuality to their music. Two prominent groups adopting traditional folk tunes into their music are: The Tetseo Sisters and Cultural Vibrants. Tribal tunes have also been incorporated into choral pieces and sung by many church choirs. The rock/pop genre, platforms in terms of concerts and rock festivals are created generally by the concerned music fraternity themselves. The state has produced Internationally acclaimed Bands like "Abiogenesis" and "Alobo Naga & the Band".