. ♪ >> i am kate munger, founder of the threshold choir.i was asked to fill in a volunteer spot for a friend who was dying of hiv aids. it was very distressing to see him comatose and agitated, so i did what i did at the time when i was nervous or afraid and i started singing. i watched him calm, settle, get positively serene and i calmed, settled and got positively serene and felt i had discovered something or rediscovered something, ancient practice that tribal humans do for one another when someone's struggling. >> has helped with relieving some of my pain. some of my physical pain. in my head. i just smile a lot. ♪ my grateful heart >> i came close to death. i had a brain tumor that was very large and it was a pretty scary time. and i came out of that surgery blind and unable to walk. and i had an opportunity to decide okay, what am i going to do now? if i get better, i'm going to do something important. i always loved to sing and i heard there were these people that sang to people who were dying. and i thought that was the most incredi