"Lavani" is a widely practised form of folk music in southern Malwa, which was brought to the region by the Marathas. The "Nirguni Lavani" (philosophical) and the "Shringari Lavani" (erotic) are two of the main genres. The Bhils have their own folk songs, which are always accompanied by dance. The folk musical modes of Malwa are of four or five notes, and in rare cases six. The devotional music of the "Nirguni" cult is popular throughout Malwa. Legends of "Raja" Bhoj and "Bijori", the "Kanjar" girl, and the tale of "Balabau" are popular themes for folk songs. Insertions known as "stobha" are commonly used in Malwa music; this can occur in four ways: the "matra stobha" (syllable insertion), "varna stobha" (letter insertion), "shabda stobha" (word insertion) and "vakya stobha" (sentence insertion).