Afrobeat, Juju, Fuji, Highlife, Makossa, and Kizomba are performed in West Africa. West African music has regional variations, with Muslim regions incorporating elements of Islamic music and non-Muslim regions more influenced by indigenous traditions, according to the historian Sylviane Diouf and ethnomusicologist Gerhard Kubik. According to Diouf, traditional Muslim West African Music incorporates elements of the Islamic call to prayer (originating from Bilal ibn Rabah, an Abyssinian African Muslim in the early 7th century), including lyrics praising God, melody, note changes, "words that seem to quiver and shake" in the vocal chords, dramatic changes in musical scales, and nasal intonation. According to Kubik, the vocal style of Muslim West African singers "using melisma, wavy intonation, and so forth is a heritage of that large region of West Africa that had been in contact with the Arabic-Islamic world of the Maghreb since the seventh and eighth centuries." In terms of instrumentation, Kubik notes that stringed instruments (including ancestors of the banjo) were traditionally favored by Muslim West Africans, while drumming was traditionally favored by non-Muslim West Africans.