Re: Ka Sa La Ma.
These reminded me of the Bija mantras of the Indian Chakra (Energy Center/Sefec Ba Ra) system. I believe Depak Chopra in his audio lectures, at least early on, had lessons with chanting the vowel sounds and I believe also the root sounds of the chakras, or I may be remembering it from early on when I did some Ayurveda studies.
So if you have studied within the Indian Tradition, there may be some correlation there as well.
Excerpt from article:
The bija mantras for the chakras are formed from the semi-vowels of the Sanskrit alphabet YA, RA, LA, VA. They are called ‘antahstha’or intermediate sounds in Sanskrit.
Link for full article: http://www.simonheather.co.uk/pages/articles/how_to_sound_bija_mantras.pdf
“MA” is also a root bija in the Indian System.
I also did a “google” search and found this, within the Indian tradition:
Srividya mantra is the Mother Tripurasundari’s mula mantra (root or core – mantra). Sundari’s mantra is the famous Panchadashi or fifteen syllable mantra. It has three sections (kutas), each ending with the mantra Hrim, which mantra by itself can be used to worship Tripura Sundari or Lalita.
KA E I LA HRIM
HA SA KA HA LA HRIM
SA KA LA HRIM
The link for this is: http://srividyasadhana.com/srividya-mantra/
There were some other google correlations, but these seemed to be the most “spiritual”.