Here is a simple video showing the basic vowels and consonants of Sanskrit and explaining, in a very simple way, how to pronounce them.
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How to understand and quickly master the diacritics:
Part 1 is here: Sanskrit Pronunciation
Part 2 is here: Sanskrit Pronunciation
and
Part 3 is here: Sanskrit Pronunciation
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I have collected my sanskrit pronunciation course resources on one page now on our Gita Jayanti Int'l Network on gitajayanti.ning.com - here's the easy-to-remember shortcut for it:: http://tiny.cc/sanskrit