Eric Whitacre: A virtual choir 2,000 voices strong

TED 2011
Eric Whitacre: A virtual choir 2,000 voices strong (script)
Summary
The speaker didn't know that the choir was very great. However, when he listened to them sing, he was fascinated by it. He wrote a piece of music for choir and it was published later. He started conducting and he finally became a professional classical composer and conductor.
And then, he had a virtual choir idea when he saw YouTube which his fan posted. The virtual choir is that collection many videos to be posted by people in the world are singing their parts soprano, alto, tenor and bass. It's all cut, edited and created.
He, of course, joined in it. First, he posted a conductor track of himself conducting. It's in complete silence and the sound of the piano was posted later. People can listen to it, sing and post their videos to YouTube.
The beautiful videos were created. In those videos, they've never met, but they are connected anyway like a family. The power which people seek to find and connect with each other is very strong and wonderful. I think that the powers of music, singing and technology also help those videos. That's a great choir.
Words in this story
choir / kwάɪɚ/ an organized group of singers, typically one that takes part in church services or performs regularly in public.
dissonance / lack of harmony among musical notes.
viral / that is circulated rapidly on the Internet, like viruses spread.
virtual / almost, but not ​exactly or in every way.