Teaching by example can only have a very limited effect Dick and it's more likely to produce copyists in my opinion
Booking good guests can have the opposite effect - "I'll never be be able to sing that good so why bother?"
MacColl and others worked on the basis that. unless you had a physical problem, almost everybody could become a singer
He qualified it be saying, if you want to be a better singer you have to put in the hours
He went on to devise a technique whereby an aspiring singer could break down the problems - with help, if possible, but alone if necessary
I saw that work many times - beats the hell out of admiring somebody from afar
Jim