In this thread I shall analyze some mantras. If you know of others, do post them!
I'll start with what os considered to be the simplest and most porwerful of all, OM.
First of all, I'd like to note that on the Sri Yantra CD booklet, they say that the Sri Yantra sound corresponds to the OM sound.
Ted Andrews in his "How to See and Read the Aura" book, analyzes some mantras. About OM, he says
It is also believed that there are several hundred ways of pronouncing and intoning Om - each with its own unique effect over the aura. When you emphasize and prolong the "O", you affect others and your owb auric field. When the "M" (humming sound) is prolonged, the entire effect is produced more internally.
(....)
It arranges all particles of your subtle bodies into allignment. (...) When these energies arealigned, you can more easily restore health and gain greater benefit through meditation."