Additionally, Sam-Ang Sam differentiates between music made by the mainstream Cambodians ("Cambodian music") and the distinct music of ethnic minorities (part of the "music of Cambodia"). The latter includes music made by people living in Rattanakiri and Mundulkiri provinces, the Koulen and Cardamom ranges, and the vicinity "around the great lake (Tonle Sap)." Differences of language and religion help to create the separation between the different cultures. Ethnic groups include upland Mon-Khmer language groups (Pnorng, Kuoy (Kui), Por, Samre) whose music consists of "gong ensembles, drum ensembles, and free-reed mouth organs with gourd windchests." Other ethnic groups include Cham, Chinese, Vietnamese who all potentially could have music from their home cultures, but which is "unknown."