DHUAN, Punjabi for smoke, is a term which is particularly used for seats of certain monkish orders where a fire is perennially kept alive. In the Sikh context it is employed for the four branches of Udasi Sikhs established by Baba Gurditta (1613-38), on whom the headship of the sect was conferred by Baba Sri Ghand, traditionally considered founder of the sect. The dhuans are generally known after their respective heads who were initially assigned to different regions in north India for preaching the tenets of Sikhism as laid down by Guru Nanak.
DHUNI, from Skt. dhvani meaning sound, echo, noise, voice, tone, tune, thunder, stands in Punjabi generally for sound and tune. In the Guru Granth Sahib, the term appears in the sense of tune at the head of 9 of the 22 vars (odes) under different ragas or musical measures. Directions with regard to the tunes in which those vars were meant to be sung were recorded by Guru Arjan when compiling the Holy Book. The classical system of Indian music had well established tunes and corresponding prosodic forms; but the var, being basically a folk form, did not have any prescribed order.