This is part of a documentary released a few years back (Before the Music Dies).  If you are able to see the whole thing please watch here on Hulu:
 
http://www.hulu.com/watch/62945
 
Here is a clip of it if you don't have the time to watch the whole thing:
 
https://vimeo.com/29126627
 
I think there are some really valuable statements here.  Please share your thoughts afterward.
 
Best,
 
RKS