Nasyid is a form of religious singing based on Islamic teachings, stories and so on. It used to be more in the Arabic tune but nowadays Nasyid is sung to newer musical tempo to suite taste of current listeners.
Professor Margaret Sarkissian has published a paper entitled “Religion never had it so good”: Contemporary nasyid and the growth of Islamic popular music in Malaysia, in the Yearbook for Traditional Music, vol. 37, pp. 124-152, 2005.