 It is popular in the Sikh tradition from northern India and is part of daily prayers being conducted in Sikh Gurdwaras.Every raga has a strict set of rules which govern the number of notes that can be used; which notes can be used; and their interplay that has to be adhered to for the composition of a tune.In the Guru Granth Sahib, the Sikh holy Granth (book) there are 60 Ragas of equal and independent status.