IMU, according to the Vedic theory of speech, the main function of consonants is to provide transition from one vowel of diphthong to another.
It might be that the original creators of Vedic hymns were Siberian shamans, or stuff. Thus, the "famous" Samic joiku (yoi-coo) might be related to Vedic hymns. In joiku the main transitional consonants are 'k', 'n' and 'l', like nunnuka nunnuka loilaa loilaa IMO, 'l' is by far the most frequent of those three. So, the first line of Rgveda as a joiku could be lalin liilee lulolilan Modernized joiku: http://www.youtube.com/watch?v=oQFIreElK5A
