A few years back I made this query but got no answer. Thought I'd try again. In the mid 80s I compiled a library of music of over 3100 pieces. It is the only thing I listen to in my cars. So over the many years several have become my favorite. The second of which is Nana Mouskouri's Amazing Grace. This song, IMHO, best puts out her incredible voice and I have more than one of her albums. But gettng back to the piece, in the background is a choral group that sounds almost as good as her. I have...