I received the following link and info in a an email. Thought I would share.
"AN ABUNDANCE OF TECHNOLOGY WENT INTO THIS...
For those who are not so geeky, let me explain that this singer had to record each of the tracks one at a time, and had to get the timing just perfect in order for it to work. LOTS of technology went into this. And the song ain't bad, either. (that's an understatement!)
So, turn up your volume, maximize your screen, click on the link below, then sit back and enjoy!
How Great Thou Art - HD - Barbershop Multi-track"
but new technology