I forget exactly who it was who pointed out the grating sound of the voices of Bill and Gloria Gayther. They did write a couple of good songs that made them very popular but that probably would have been the end of their story if they had not gone out and hired lots of other people to do most of their singing so that nowadays we do not have to listen to an entire two or three hours of only Bill and Gloria. Obviously sometimes writing a good song that says something people can relate to is more important than just having the best voice.