Param- Parai produce Nada (Sound) Nada-Bindu Sound-Light produce Vindu, Nada, Nibodhina For Nada, as Raghava-bhatta says, exists in three states. In Nada are the guna (sattva, rajas, and tamas), which form the substance of Prakriti, which with Shiva It is. When tamo-guna predominates Nada is merely an indistinct or unmanifested (dhvanyat ? mako?vykta-nadah) sound in the nature of dhvani. In this state, in which it is a phase of Avyaktanada, it is called Nibodhika, or Bodhini. It is Nada when rajoguna is in the ascendant, when there is a sound in which there is something like a connected or combined disposition of the letters. When the sattva-guna preponderates Nada assumes the form of Vindu. The action of rajas on tamas is to veil. Its own independent action effects an arrangement which is only perfected by the emergence of the essentially manifesting sattvika guna set into play by it. Nada, Vindu, and Nibodhika, and the Shakti, of which they are the specific manifestation, are said to be in the form of Sun, Moon, and Fire respectively. Jñana (spiritual wisdom) is spoken of as fire as it burns up all actions, and the tamoguna is associated with it. For when the effect of cause and effect of action are really known, then action ceases. Ichchha is the Moon. The Moon contains the sixteenth digit, the Ama-kala with its nectar, which neither increases nor decays, and Ichchha, or will, is the eternal precursor of creation. Kriya is like the Sun, for as the Sun by its light makes all things visible, so unless there is action and striving there cannot be realization or manifestation. As the Gita sways: As one Sun makes manifest all the loka. Quoted from Webiste: Spiritual Library Cologne Sanskrit Dictionary nada - deep blue, with a triple twist, space. naDa or m. (L. also n.) a species of reed , Arundo Tibialis or Karka 2 nada m. a roarer , bellower , thunderer , crier , neigher . (as a cloud , horse , bull , met. a man (beginning with {nadam}) S3 a river (if thought of as male ifc. ind. {-nadam} ; cf. {nadI}) = {naDa} , reed ({I}) f. see {nadI4}. 3 nADa n. (fr. {naDa}) = {nAla} , a hollow stalk L. ; ({A}) f. N. of a partic. verse Vait. 4 nAda m. ( {nad}) a loud sound , roaring , bellowing , crying any sound or tone (= {zabda} L.) ; (in the Yoga) the nasal sound repressented by a semicircle and used as an abbreviation in mystical words a praiser (= {stotR}) In the All Powerful Ten, Nada or Tilaka represents the mind Mandala. http://kalachakranet.org/kalachakra_tantra_10-fold_powerful.html Nada, Anusvara, Visarga, Ha, Ksa, Ma, La, Va, Ra, Ya http://www.kalacakra.org/namcu/namcu.htm