Music, more technically speaking "hymns" or "psalms" ("Mezmur" — መዝሙር – in Amharic, the official language of Ethiopia, and also in other Ethiopian-Eritrean languages as well) plays a big role in preaching and the daily life of P'ent'ay/Evangelical Christians. With the belief that music should be for God, and him alone, Ethiopian "mezmur" does not have ethnic or cultural boundaries, nor restriction on what style or instruments to use. However, there are apparent influences from American evangelicals that have led to commercialization and cross-overs. CD, cassette and DVD sales are now one of the rare Ethiopian industries on the rise.