I noticed that in the Native American music a repetition of the vowel sounds: ah, ay, oh. Also with Deva Premal, the ah, ay sounds. The sounds ee and oo are necessarily either excitement, ee, or drama, oo. It is important to hear the vowels for they indicate action and /or rest depending upon the expressions in use.
The virtue of a highly evolved being embraces all people and things and dispels the darkness which isolates them.
Hua Hu Ching-primary lesson.