Thus î ( [ ) reflects “this” the tangible aspect of Brahman and it is synonymous with Īshwara or Īndra in various texts.
◊ û ( ] ) is the unfolding māyā, it is the measure of things as our consciousness moulds out forms in the formless ; it is Aleph – naught, א0 – the countable infinity of Cantor’s theory. This next shlöka establishes how the udañch ( ]dHca\ ) can be understood as udgītah, the universal song of consciousness…..
esa u  vā udgīthah, prāno vā ut, prānena hīdam sarvam uttabdham,
vāg eva gīthā , ut ca gīthā ceti, sa udgīthah . Br. Up. I.3.23
And this û is udgītha, the universal song. The vital breath prāna is ut, for by vital breath is this whole creation upheld, supported. The universal song, verily, is speech. This is udgītha, for it is ut and gītha.
Thus û ( ] ) combines the life breath, prāna ; and speech, vāk together into our consciousness giving rise to this māyā or surrealism.
The number of ‘svars’.
◊ The number of svars, vowels according to the Paniniya Māhāsūtrās is 13. (See Table 1. above). Besides the three primary vowels discussed above there are two more r (pronounced ri) and l (pronounced Lri). These two are half-way between vowels and consonants since the tip of the tongue is used in pronouncing them. In fact the Śiva Sūtras  term these two vowels as sandha or eunuchs. All these five vowels are of single sound i.e. of one mātrā.