Well please add then and find sources The problem is finding sources for all this stuff Lata s voice becomes much more nasal as she ages but quite frankly I find most Indian classical vocalists a bit nasal So I assume the acceptable nasal quality in a singer is just a matter of taste What I hear in Lata s voice is first an obviously profound ability to intuit ragas The sound just feels right Her tropes ornaments shading it sounds classical without being classical But she also sounds personal You can hear the voice itself speaking in a way that doesn t happen amid the depth of classical indian vocal style with it s baroque ornamentation Of course none of this sort of thing belongs here in wikipedia It s all personal opinion What one would need to bring this sort of thing into the article would be the opinion of a musicologist specializing in Indian music Even an album liner by a famous musician would help E g for Asha the liner notes on Legacy talking about her classical ability etc are fair game tbyrnestl